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Finding the Fourth Proportional to 74,754.92, 112,129.92 and 30,368.52

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Solution

The fourth proportional to 74,754.92, 112,129.92 and 30,368.52 is: 45,551.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,754.92 : 112,129.92 = 30,368.52 : x
  2. Step 2: Convert to fraction form
    74,754.92/112,129.92 = 30,368.52/x
  3. Step 3: Cross multiply
    74,754.92x = 112,129.92 × 30,368.52
  4. Step 4: Simplify right side
    74,754.92x = 3,405,219,718.12
  5. Step 5: Solve for x
    x = 3,405,219,718.12/74,754.92
  6. Step 6: Final answer
    x = 45,551.78

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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.