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Finding the Fourth Proportional to 278,715.01, 418,100.20 and 89,127.74

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Solution

The fourth proportional to 278,715.01, 418,100.20 and 89,127.74 is: 133,700.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,715.01 : 418,100.20 = 89,127.74 : x
  2. Step 2: Convert to fraction form
    278,715.01/418,100.20 = 89,127.74/x
  3. Step 3: Cross multiply
    278,715.01x = 418,100.20 × 89,127.74
  4. Step 4: Simplify right side
    278,715.01x = 37,264,325,919.55
  5. Step 5: Solve for x
    x = 37,264,325,919.55/278,715.01
  6. Step 6: Final answer
    x = 133,700.46

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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.