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Finding the Fourth Proportional to 74,813.78, 103,252.56 and 42,988.88

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Solution

The fourth proportional to 74,813.78, 103,252.56 and 42,988.88 is: 59,330.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,813.78 : 103,252.56 = 42,988.88 : x
  2. Step 2: Convert to fraction form
    74,813.78/103,252.56 = 42,988.88/x
  3. Step 3: Cross multiply
    74,813.78x = 103,252.56 × 42,988.88
  4. Step 4: Simplify right side
    74,813.78x = 4,438,711,911.53
  5. Step 5: Solve for x
    x = 4,438,711,911.53/74,813.78
  6. Step 6: Final answer
    x = 59,330.14

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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.