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Finding the Fourth Proportional to 74,974.30, 112,405.88 and 45,385.13

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Solution

The fourth proportional to 74,974.30, 112,405.88 and 45,385.13 is: 68,044.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,974.30 : 112,405.88 = 45,385.13 : x
  2. Step 2: Convert to fraction form
    74,974.30/112,405.88 = 45,385.13/x
  3. Step 3: Cross multiply
    74,974.30x = 112,405.88 × 45,385.13
  4. Step 4: Simplify right side
    74,974.30x = 5,101,555,476.56
  5. Step 5: Solve for x
    x = 5,101,555,476.56/74,974.30
  6. Step 6: Final answer
    x = 68,044.06

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1.5x scale

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.