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Finding the Fourth Proportional to 74,691.40, 112,034.40 and 30,316.90

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Solution

The fourth proportional to 74,691.40, 112,034.40 and 30,316.90 is: 45,474.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,691.40 : 112,034.40 = 30,316.90 : x
  2. Step 2: Convert to fraction form
    74,691.40/112,034.40 = 30,316.90/x
  3. Step 3: Cross multiply
    74,691.40x = 112,034.40 × 30,316.90
  4. Step 4: Simplify right side
    74,691.40x = 3,396,535,701.36
  5. Step 5: Solve for x
    x = 3,396,535,701.36/74,691.40
  6. Step 6: Final answer
    x = 45,474.25

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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.