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Finding the Fourth Proportional to 90,812.00, 136,218.07 and 43,415.91

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Solution

The fourth proportional to 90,812.00, 136,218.07 and 43,415.91 is: 65,123.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,812.00 : 136,218.07 = 43,415.91 : x
  2. Step 2: Convert to fraction form
    90,812.00/136,218.07 = 43,415.91/x
  3. Step 3: Cross multiply
    90,812.00x = 136,218.07 × 43,415.91
  4. Step 4: Simplify right side
    90,812.00x = 5,914,031,358.95
  5. Step 5: Solve for x
    x = 5,914,031,358.95/90,812.00
  6. Step 6: Final answer
    x = 65,123.90

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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.