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Finding the Fourth Proportional to 91,230.10, 136,845.15 and 80,862.10

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Solution

The fourth proportional to 91,230.10, 136,845.15 and 80,862.10 is: 121,293.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,230.10 : 136,845.15 = 80,862.10 : x
  2. Step 2: Convert to fraction form
    91,230.10/136,845.15 = 80,862.10/x
  3. Step 3: Cross multiply
    91,230.10x = 136,845.15 × 80,862.10
  4. Step 4: Simplify right side
    91,230.10x = 11,065,586,203.82
  5. Step 5: Solve for x
    x = 11,065,586,203.82/91,230.10
  6. Step 6: Final answer
    x = 121,293.15

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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.