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Finding the Fourth Proportional to 84,890.70, 127,336.05 and 81,610.20

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Solution

The fourth proportional to 84,890.70, 127,336.05 and 81,610.20 is: 122,415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,890.70 : 127,336.05 = 81,610.20 : x
  2. Step 2: Convert to fraction form
    84,890.70/127,336.05 = 81,610.20/x
  3. Step 3: Cross multiply
    84,890.70x = 127,336.05 × 81,610.20
  4. Step 4: Simplify right side
    84,890.70x = 10,391,920,507.71
  5. Step 5: Solve for x
    x = 10,391,920,507.71/84,890.70
  6. Step 6: Final answer
    x = 122,415.30

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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.