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Finding the Fourth Proportional to 90,462.71, 124,820.54 and 54,654.70

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Solution

The fourth proportional to 90,462.71, 124,820.54 and 54,654.70 is: 75,412.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,462.71 : 124,820.54 = 54,654.70 : x
  2. Step 2: Convert to fraction form
    90,462.71/124,820.54 = 54,654.70/x
  3. Step 3: Cross multiply
    90,462.71x = 124,820.54 × 54,654.70
  4. Step 4: Simplify right side
    90,462.71x = 6,822,029,167.54
  5. Step 5: Solve for x
    x = 6,822,029,167.54/90,462.71
  6. Step 6: Final answer
    x = 75,412.61

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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.