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Finding the Fourth Proportional to 127,987.74, 176,540.85 and 77,686.74

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Solution

The fourth proportional to 127,987.74, 176,540.85 and 77,686.74 is: 107,157.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,987.74 : 176,540.85 = 77,686.74 : x
  2. Step 2: Convert to fraction form
    127,987.74/176,540.85 = 77,686.74/x
  3. Step 3: Cross multiply
    127,987.74x = 176,540.85 × 77,686.74
  4. Step 4: Simplify right side
    127,987.74x = 13,714,883,113.33
  5. Step 5: Solve for x
    x = 13,714,883,113.33/127,987.74
  6. Step 6: Final answer
    x = 107,157.79

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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.