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Finding the Fourth Proportional to 88,901.90, 133,093.65 and 86,309.90

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Solution

The fourth proportional to 88,901.90, 133,093.65 and 86,309.90 is: 129,213.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,901.90 : 133,093.65 = 86,309.90 : x
  2. Step 2: Convert to fraction form
    88,901.90/133,093.65 = 86,309.90/x
  3. Step 3: Cross multiply
    88,901.90x = 133,093.65 × 86,309.90
  4. Step 4: Simplify right side
    88,901.90x = 11,487,299,622.14
  5. Step 5: Solve for x
    x = 11,487,299,622.14/88,901.90
  6. Step 6: Final answer
    x = 129,213.21

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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.