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Finding the Fourth Proportional to 88,731.40, 133,097.10 and 65,403.40

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Solution

The fourth proportional to 88,731.40, 133,097.10 and 65,403.40 is: 98,105.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,731.40 : 133,097.10 = 65,403.40 : x
  2. Step 2: Convert to fraction form
    88,731.40/133,097.10 = 65,403.40/x
  3. Step 3: Cross multiply
    88,731.40x = 133,097.10 × 65,403.40
  4. Step 4: Simplify right side
    88,731.40x = 8,705,002,870.14
  5. Step 5: Solve for x
    x = 8,705,002,870.14/88,731.40
  6. Step 6: Final answer
    x = 98,105.10

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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.