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Finding the Fourth Proportional to 62,866.13, 86,740.05 and 39,887.58

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Solution

The fourth proportional to 62,866.13, 86,740.05 and 39,887.58 is: 55,035.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,866.13 : 86,740.05 = 39,887.58 : x
  2. Step 2: Convert to fraction form
    62,866.13/86,740.05 = 39,887.58/x
  3. Step 3: Cross multiply
    62,866.13x = 86,740.05 × 39,887.58
  4. Step 4: Simplify right side
    62,866.13x = 3,459,850,683.58
  5. Step 5: Solve for x
    x = 3,459,850,683.58/62,866.13
  6. Step 6: Final answer
    x = 55,035.21

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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.