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Finding the Fourth Proportional to 90,717.90, 136,076.85 and 90,717.90

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Solution

The fourth proportional to 90,717.90, 136,076.85 and 90,717.90 is: 136,076.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,717.90 : 136,076.85 = 90,717.90 : x
  2. Step 2: Convert to fraction form
    90,717.90/136,076.85 = 90,717.90/x
  3. Step 3: Cross multiply
    90,717.90x = 136,076.85 × 90,717.90
  4. Step 4: Simplify right side
    90,717.90x = 12,344,606,070.62
  5. Step 5: Solve for x
    x = 12,344,606,070.62/90,717.90
  6. Step 6: Final answer
    x = 136,076.85

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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.