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Finding the Fourth Proportional to 90,719.88, 136,165.98 and 55,727.88

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Solution

The fourth proportional to 90,719.88, 136,165.98 and 55,727.88 is: 83,644.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,719.88 : 136,165.98 = 55,727.88 : x
  2. Step 2: Convert to fraction form
    90,719.88/136,165.98 = 55,727.88/x
  3. Step 3: Cross multiply
    90,719.88x = 136,165.98 × 55,727.88
  4. Step 4: Simplify right side
    90,719.88x = 7,588,241,393.52
  5. Step 5: Solve for x
    x = 7,588,241,393.52/90,719.88
  6. Step 6: Final answer
    x = 83,644.75

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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.