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Finding the Fourth Proportional to 79,513.92, 109,731.84 and 43,705.20

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Solution

The fourth proportional to 79,513.92, 109,731.84 and 43,705.20 is: 60,314.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,513.92 : 109,731.84 = 43,705.20 : x
  2. Step 2: Convert to fraction form
    79,513.92/109,731.84 = 43,705.20/x
  3. Step 3: Cross multiply
    79,513.92x = 109,731.84 × 43,705.20
  4. Step 4: Simplify right side
    79,513.92x = 4,795,852,013.57
  5. Step 5: Solve for x
    x = 4,795,852,013.57/79,513.92
  6. Step 6: Final answer
    x = 60,314.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.