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Finding the Fourth Proportional to 129,458.93, 178,653.34 and 75,754.25

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Solution

The fourth proportional to 129,458.93, 178,653.34 and 75,754.25 is: 104,540.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,458.93 : 178,653.34 = 75,754.25 : x
  2. Step 2: Convert to fraction form
    129,458.93/178,653.34 = 75,754.25/x
  3. Step 3: Cross multiply
    129,458.93x = 178,653.34 × 75,754.25
  4. Step 4: Simplify right side
    129,458.93x = 13,533,749,781.70
  5. Step 5: Solve for x
    x = 13,533,749,781.70/129,458.93
  6. Step 6: Final answer
    x = 104,540.88

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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.