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Finding the Fourth Proportional to 126,618.66, 174,768.30 and 78,843.78

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Solution

The fourth proportional to 126,618.66, 174,768.30 and 78,843.78 is: 108,825.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,618.66 : 174,768.30 = 78,843.78 : x
  2. Step 2: Convert to fraction form
    126,618.66/174,768.30 = 78,843.78/x
  3. Step 3: Cross multiply
    126,618.66x = 174,768.30 × 78,843.78
  4. Step 4: Simplify right side
    126,618.66x = 13,779,393,396.17
  5. Step 5: Solve for x
    x = 13,779,393,396.17/126,618.66
  6. Step 6: Final answer
    x = 108,825.93

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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.