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Finding the Fourth Proportional to 74,871.54, 112,306.86 and 18,711.36

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Solution

The fourth proportional to 74,871.54, 112,306.86 and 18,711.36 is: 28,066.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,871.54 : 112,306.86 = 18,711.36 : x
  2. Step 2: Convert to fraction form
    74,871.54/112,306.86 = 18,711.36/x
  3. Step 3: Cross multiply
    74,871.54x = 112,306.86 × 18,711.36
  4. Step 4: Simplify right side
    74,871.54x = 2,101,414,087.93
  5. Step 5: Solve for x
    x = 2,101,414,087.93/74,871.54
  6. Step 6: Final answer
    x = 28,066.93

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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.