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Finding the Fourth Proportional to 132,681.60, 199,022.40 and 90,691.20

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Solution

The fourth proportional to 132,681.60, 199,022.40 and 90,691.20 is: 136,036.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,681.60 : 199,022.40 = 90,691.20 : x
  2. Step 2: Convert to fraction form
    132,681.60/199,022.40 = 90,691.20/x
  3. Step 3: Cross multiply
    132,681.60x = 199,022.40 × 90,691.20
  4. Step 4: Simplify right side
    132,681.60x = 18,049,580,282.88
  5. Step 5: Solve for x
    x = 18,049,580,282.88/132,681.60
  6. Step 6: Final answer
    x = 136,036.80

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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.