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Finding the Fourth Proportional to 278,801.41, 418,412.43 and 129,146.71

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Solution

The fourth proportional to 278,801.41, 418,412.43 and 129,146.71 is: 193,817.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,801.41 : 418,412.43 = 129,146.71 : x
  2. Step 2: Convert to fraction form
    278,801.41/418,412.43 = 129,146.71/x
  3. Step 3: Cross multiply
    278,801.41x = 418,412.43 × 129,146.71
  4. Step 4: Simplify right side
    278,801.41x = 54,036,588,757.61
  5. Step 5: Solve for x
    x = 54,036,588,757.61/278,801.41
  6. Step 6: Final answer
    x = 193,817.49

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1.5x scale

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.