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Finding the Fourth Proportional to 91,191.81, 136,788.33 and 28,862.31

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Solution

The fourth proportional to 91,191.81, 136,788.33 and 28,862.31 is: 43,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,191.81 : 136,788.33 = 28,862.31 : x
  2. Step 2: Convert to fraction form
    91,191.81/136,788.33 = 28,862.31/x
  3. Step 3: Cross multiply
    91,191.81x = 136,788.33 × 28,862.31
  4. Step 4: Simplify right side
    91,191.81x = 3,948,027,184.84
  5. Step 5: Solve for x
    x = 3,948,027,184.84/91,191.81
  6. Step 6: Final answer
    x = 43,293.66

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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.