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Finding the Fourth Proportional to 88,861.20, 133,364.70 and 85,945.20

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Solution

The fourth proportional to 88,861.20, 133,364.70 and 85,945.20 is: 128,988.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,861.20 : 133,364.70 = 85,945.20 : x
  2. Step 2: Convert to fraction form
    88,861.20/133,364.70 = 85,945.20/x
  3. Step 3: Cross multiply
    88,861.20x = 133,364.70 × 85,945.20
  4. Step 4: Simplify right side
    88,861.20x = 11,462,055,814.44
  5. Step 5: Solve for x
    x = 11,462,055,814.44/88,861.20
  6. Step 6: Final answer
    x = 128,988.31

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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.