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Finding the Fourth Proportional to 91,899.20, 137,848.80 and 88,011.20

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Solution

The fourth proportional to 91,899.20, 137,848.80 and 88,011.20 is: 132,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,899.20 : 137,848.80 = 88,011.20 : x
  2. Step 2: Convert to fraction form
    91,899.20/137,848.80 = 88,011.20/x
  3. Step 3: Cross multiply
    91,899.20x = 137,848.80 × 88,011.20
  4. Step 4: Simplify right side
    91,899.20x = 12,132,238,306.56
  5. Step 5: Solve for x
    x = 12,132,238,306.56/91,899.20
  6. Step 6: Final answer
    x = 132,016.80

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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.