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Finding the Fourth Proportional to 88,702.10, 133,053.15 and 81,995.30

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Solution

The fourth proportional to 88,702.10, 133,053.15 and 81,995.30 is: 122,992.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,702.10 : 133,053.15 = 81,995.30 : x
  2. Step 2: Convert to fraction form
    88,702.10/133,053.15 = 81,995.30/x
  3. Step 3: Cross multiply
    88,702.10x = 133,053.15 × 81,995.30
  4. Step 4: Simplify right side
    88,702.10x = 10,909,732,950.20
  5. Step 5: Solve for x
    x = 10,909,732,950.20/88,702.10
  6. Step 6: Final answer
    x = 122,992.95

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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.