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Finding the Fourth Proportional to 115,006.40, 172,639.20 and 88,827.20

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Solution

The fourth proportional to 115,006.40, 172,639.20 and 88,827.20 is: 133,340.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,006.40 : 172,639.20 = 88,827.20 : x
  2. Step 2: Convert to fraction form
    115,006.40/172,639.20 = 88,827.20/x
  3. Step 3: Cross multiply
    115,006.40x = 172,639.20 × 88,827.20
  4. Step 4: Simplify right side
    115,006.40x = 15,335,056,746.24
  5. Step 5: Solve for x
    x = 15,335,056,746.24/115,006.40
  6. Step 6: Final answer
    x = 133,340.90

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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.