Home / 128,666.64-177,560.38-71,306.90

Finding the Fourth Proportional to 128,666.64, 177,560.38 and 71,306.90

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Solution

The fourth proportional to 128,666.64, 177,560.38 and 71,306.90 is: 98,403.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,666.64 : 177,560.38 = 71,306.90 : x
  2. Step 2: Convert to fraction form
    128,666.64/177,560.38 = 71,306.90/x
  3. Step 3: Cross multiply
    128,666.64x = 177,560.38 × 71,306.90
  4. Step 4: Simplify right side
    128,666.64x = 12,661,280,260.62
  5. Step 5: Solve for x
    x = 12,661,280,260.62/128,666.64
  6. Step 6: Final answer
    x = 98,403.75

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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.