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Finding the Fourth Proportional to 62,065.92, 85,680 and 39,722.88

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Solution

The fourth proportional to 62,065.92, 85,680 and 39,722.88 is: 54,836.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,065.92 : 85,680 = 39,722.88 : x
  2. Step 2: Convert to fraction form
    62,065.92/85,680 = 39,722.88/x
  3. Step 3: Cross multiply
    62,065.92x = 85,680 × 39,722.88
  4. Step 4: Simplify right side
    62,065.92x = 3,403,456,358.40
  5. Step 5: Solve for x
    x = 3,403,456,358.40/62,065.92
  6. Step 6: Final answer
    x = 54,836.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.