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Finding the Fourth Proportional to 128,520.53, 177,268.17 and 89,693.53

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Solution

The fourth proportional to 128,520.53, 177,268.17 and 89,693.53 is: 123,714.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,520.53 : 177,268.17 = 89,693.53 : x
  2. Step 2: Convert to fraction form
    128,520.53/177,268.17 = 89,693.53/x
  3. Step 3: Cross multiply
    128,520.53x = 177,268.17 × 89,693.53
  4. Step 4: Simplify right side
    128,520.53x = 15,899,807,923.94
  5. Step 5: Solve for x
    x = 15,899,807,923.94/128,520.53
  6. Step 6: Final answer
    x = 123,714.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.