Home / 81,868.40-122,802.60-56,985.20

Finding the Fourth Proportional to 81,868.40, 122,802.60 and 56,985.20

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Solution

The fourth proportional to 81,868.40, 122,802.60 and 56,985.20 is: 85,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,868.40 : 122,802.60 = 56,985.20 : x
  2. Step 2: Convert to fraction form
    81,868.40/122,802.60 = 56,985.20/x
  3. Step 3: Cross multiply
    81,868.40x = 122,802.60 × 56,985.20
  4. Step 4: Simplify right side
    81,868.40x = 6,997,930,721.52
  5. Step 5: Solve for x
    x = 6,997,930,721.52/81,868.40
  6. Step 6: Final answer
    x = 85,477.80

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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.