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Finding the Fourth Proportional to 128,099.44, 176,769.80 and 71,514.40

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Solution

The fourth proportional to 128,099.44, 176,769.80 and 71,514.40 is: 98,685.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,099.44 : 176,769.80 = 71,514.40 : x
  2. Step 2: Convert to fraction form
    128,099.44/176,769.80 = 71,514.40/x
  3. Step 3: Cross multiply
    128,099.44x = 176,769.80 × 71,514.40
  4. Step 4: Simplify right side
    128,099.44x = 12,641,586,185.12
  5. Step 5: Solve for x
    x = 12,641,586,185.12/128,099.44
  6. Step 6: Final answer
    x = 98,685.73

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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.