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Finding the Fourth Proportional to 74,697.52, 103,079.95 and 40,705.31

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Solution

The fourth proportional to 74,697.52, 103,079.95 and 40,705.31 is: 56,171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,697.52 : 103,079.95 = 40,705.31 : x
  2. Step 2: Convert to fraction form
    74,697.52/103,079.95 = 40,705.31/x
  3. Step 3: Cross multiply
    74,697.52x = 103,079.95 × 40,705.31
  4. Step 4: Simplify right side
    74,697.52x = 4,195,901,471.77
  5. Step 5: Solve for x
    x = 4,195,901,471.77/74,697.52
  6. Step 6: Final answer
    x = 56,171.90

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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.