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Finding the Fourth Proportional to 90,793.62, 136,018.71 and 51,379.02

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Solution

The fourth proportional to 90,793.62, 136,018.71 and 51,379.02 is: 76,971.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,793.62 : 136,018.71 = 51,379.02 : x
  2. Step 2: Convert to fraction form
    90,793.62/136,018.71 = 51,379.02/x
  3. Step 3: Cross multiply
    90,793.62x = 136,018.71 × 51,379.02
  4. Step 4: Simplify right side
    90,793.62x = 6,988,508,021.46
  5. Step 5: Solve for x
    x = 6,988,508,021.46/90,793.62
  6. Step 6: Final answer
    x = 76,971.36

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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.