Home / 81,408,000.20-122,112,000.30-57,520,128.20

Finding the Fourth Proportional to 81,408,000.20, 122,112,000.30 and 57,520,128.20

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Solution

The fourth proportional to 81,408,000.20, 122,112,000.30 and 57,520,128.20 is: 86,280,192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,408,000.20 : 122,112,000.30 = 57,520,128.20 : x
  2. Step 2: Convert to fraction form
    81,408,000.20/122,112,000.30 = 57,520,128.20/x
  3. Step 3: Cross multiply
    81,408,000.20x = 122,112,000.30 × 57,520,128.20
  4. Step 4: Simplify right side
    81,408,000.20x = 7,023,897,912,014,439
  5. Step 5: Solve for x
    x = 7,023,897,912,014,439/81,408,000.20
  6. Step 6: Final answer
    x = 86,280,192.30

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.