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Finding the Fourth Proportional to 88,717.84, 133,140.12 and 65,405.20

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Solution

The fourth proportional to 88,717.84, 133,140.12 and 65,405.20 is: 98,154.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,717.84 : 133,140.12 = 65,405.20 : x
  2. Step 2: Convert to fraction form
    88,717.84/133,140.12 = 65,405.20/x
  3. Step 3: Cross multiply
    88,717.84x = 133,140.12 × 65,405.20
  4. Step 4: Simplify right side
    88,717.84x = 8,708,056,176.62
  5. Step 5: Solve for x
    x = 8,708,056,176.62/88,717.84
  6. Step 6: Final answer
    x = 98,154.51

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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.