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Finding the Fourth Proportional to 88,712.90, 133,069.35 and 80,548.10

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Solution

The fourth proportional to 88,712.90, 133,069.35 and 80,548.10 is: 120,822.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,712.90 : 133,069.35 = 80,548.10 : x
  2. Step 2: Convert to fraction form
    88,712.90/133,069.35 = 80,548.10/x
  3. Step 3: Cross multiply
    88,712.90x = 133,069.35 × 80,548.10
  4. Step 4: Simplify right side
    88,712.90x = 10,718,483,310.74
  5. Step 5: Solve for x
    x = 10,718,483,310.74/88,712.90
  6. Step 6: Final answer
    x = 120,822.15

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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.