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Finding the Fourth Proportional to 62,720.02, 86,594.16 and 38,872

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Solution

The fourth proportional to 62,720.02, 86,594.16 and 38,872 is: 53,668.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,720.02 : 86,594.16 = 38,872 : x
  2. Step 2: Convert to fraction form
    62,720.02/86,594.16 = 38,872/x
  3. Step 3: Cross multiply
    62,720.02x = 86,594.16 × 38,872
  4. Step 4: Simplify right side
    62,720.02x = 3,366,088,187.52
  5. Step 5: Solve for x
    x = 3,366,088,187.52/62,720.02
  6. Step 6: Final answer
    x = 53,668.48

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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.