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Finding the Fourth Proportional to 127,987.69, 176,610.75 and 71,402.71

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Solution

The fourth proportional to 127,987.69, 176,610.75 and 71,402.71 is: 98,528.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,987.69 : 176,610.75 = 71,402.71 : x
  2. Step 2: Convert to fraction form
    127,987.69/176,610.75 = 71,402.71/x
  3. Step 3: Cross multiply
    127,987.69x = 176,610.75 × 71,402.71
  4. Step 4: Simplify right side
    127,987.69x = 12,610,486,165.13
  5. Step 5: Solve for x
    x = 12,610,486,165.13/127,987.69
  6. Step 6: Final answer
    x = 98,528.90

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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.