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Finding the Fourth Proportional to 57,715.15, 86,600.14 and 39,973.11

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Solution

The fourth proportional to 57,715.15, 86,600.14 and 39,973.11 is: 59,978.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,715.15 : 86,600.14 = 39,973.11 : x
  2. Step 2: Convert to fraction form
    57,715.15/86,600.14 = 39,973.11/x
  3. Step 3: Cross multiply
    57,715.15x = 86,600.14 × 39,973.11
  4. Step 4: Simplify right side
    57,715.15x = 3,461,676,984.68
  5. Step 5: Solve for x
    x = 3,461,676,984.68/57,715.15
  6. Step 6: Final answer
    x = 59,978.65

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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.