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Finding the Fourth Proportional to 238,901.92, 358,385.84 and 81,088

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Solution

The fourth proportional to 238,901.92, 358,385.84 and 81,088 is: 121,643.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,901.92 : 358,385.84 = 81,088 : x
  2. Step 2: Convert to fraction form
    238,901.92/358,385.84 = 81,088/x
  3. Step 3: Cross multiply
    238,901.92x = 358,385.84 × 81,088
  4. Step 4: Simplify right side
    238,901.92x = 29,060,790,993.92
  5. Step 5: Solve for x
    x = 29,060,790,993.92/238,901.92
  6. Step 6: Final answer
    x = 121,643.19

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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.