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Finding the Fourth Proportional to 62,781.48, 86,654.88 and 38,894.58

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Solution

The fourth proportional to 62,781.48, 86,654.88 and 38,894.58 is: 53,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,781.48 : 86,654.88 = 38,894.58 : x
  2. Step 2: Convert to fraction form
    62,781.48/86,654.88 = 38,894.58/x
  3. Step 3: Cross multiply
    62,781.48x = 86,654.88 × 38,894.58
  4. Step 4: Simplify right side
    62,781.48x = 3,370,405,162.55
  5. Step 5: Solve for x
    x = 3,370,405,162.55/62,781.48
  6. Step 6: Final answer
    x = 53,684.70

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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.