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Finding the Fourth Proportional to 74,891.40, 112,305.85 and 30,488.01

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Solution

The fourth proportional to 74,891.40, 112,305.85 and 30,488.01 is: 45,719.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,891.40 : 112,305.85 = 30,488.01 : x
  2. Step 2: Convert to fraction form
    74,891.40/112,305.85 = 30,488.01/x
  3. Step 3: Cross multiply
    74,891.40x = 112,305.85 × 30,488.01
  4. Step 4: Simplify right side
    74,891.40x = 3,423,981,877.86
  5. Step 5: Solve for x
    x = 3,423,981,877.86/74,891.40
  6. Step 6: Final answer
    x = 45,719.29

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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.