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Finding the Fourth Proportional to 91,251.20, 136,617.60 and 91,251.20

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Solution

The fourth proportional to 91,251.20, 136,617.60 and 91,251.20 is: 136,617.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,251.20 : 136,617.60 = 91,251.20 : x
  2. Step 2: Convert to fraction form
    91,251.20/136,617.60 = 91,251.20/x
  3. Step 3: Cross multiply
    91,251.20x = 136,617.60 × 91,251.20
  4. Step 4: Simplify right side
    91,251.20x = 12,466,519,941.12
  5. Step 5: Solve for x
    x = 12,466,519,941.12/91,251.20
  6. Step 6: Final answer
    x = 136,617.60

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1.5x scale

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.