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Finding the Fourth Proportional to 62,388.42, 86,104.80 and 39,720.17

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Solution

The fourth proportional to 62,388.42, 86,104.80 and 39,720.17 is: 54,819.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,388.42 : 86,104.80 = 39,720.17 : x
  2. Step 2: Convert to fraction form
    62,388.42/86,104.80 = 39,720.17/x
  3. Step 3: Cross multiply
    62,388.42x = 86,104.80 × 39,720.17
  4. Step 4: Simplify right side
    62,388.42x = 3,420,097,293.82
  5. Step 5: Solve for x
    x = 3,420,097,293.82/62,388.42
  6. Step 6: Final answer
    x = 54,819.42

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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.