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Finding the Fourth Proportional to 88,906.40, 133,100.40 and 86,314.40

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Solution

The fourth proportional to 88,906.40, 133,100.40 and 86,314.40 is: 129,219.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,906.40 : 133,100.40 = 86,314.40 : x
  2. Step 2: Convert to fraction form
    88,906.40/133,100.40 = 86,314.40/x
  3. Step 3: Cross multiply
    88,906.40x = 133,100.40 × 86,314.40
  4. Step 4: Simplify right side
    88,906.40x = 11,488,481,165.76
  5. Step 5: Solve for x
    x = 11,488,481,165.76/88,906.40
  6. Step 6: Final answer
    x = 129,219.96

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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.