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Finding the Fourth Proportional to 91,415.80, 137,133.78 and 29,071.72

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Solution

The fourth proportional to 91,415.80, 137,133.78 and 29,071.72 is: 43,610.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,415.80 : 137,133.78 = 29,071.72 : x
  2. Step 2: Convert to fraction form
    91,415.80/137,133.78 = 29,071.72/x
  3. Step 3: Cross multiply
    91,415.80x = 137,133.78 × 29,071.72
  4. Step 4: Simplify right side
    91,415.80x = 3,986,714,854.70
  5. Step 5: Solve for x
    x = 3,986,714,854.70/91,415.80
  6. Step 6: Final answer
    x = 43,610.79

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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.