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Finding the Fourth Proportional to 128,373.44, 177,155.76 and 71,798.24

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Solution

The fourth proportional to 128,373.44, 177,155.76 and 71,798.24 is: 99,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,373.44 : 177,155.76 = 71,798.24 : x
  2. Step 2: Convert to fraction form
    128,373.44/177,155.76 = 71,798.24/x
  3. Step 3: Cross multiply
    128,373.44x = 177,155.76 × 71,798.24
  4. Step 4: Simplify right side
    128,373.44x = 12,719,471,773.86
  5. Step 5: Solve for x
    x = 12,719,471,773.86/128,373.44
  6. Step 6: Final answer
    x = 99,081.80

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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.