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Finding the Fourth Proportional to 121,037.20, 181,728.60 and 68,549.20

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Solution

The fourth proportional to 121,037.20, 181,728.60 and 68,549.20 is: 102,921.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,037.20 : 181,728.60 = 68,549.20 : x
  2. Step 2: Convert to fraction form
    121,037.20/181,728.60 = 68,549.20/x
  3. Step 3: Cross multiply
    121,037.20x = 181,728.60 × 68,549.20
  4. Step 4: Simplify right side
    121,037.20x = 12,457,350,147.12
  5. Step 5: Solve for x
    x = 12,457,350,147.12/121,037.20
  6. Step 6: Final answer
    x = 102,921.66

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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.