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Finding the Fourth Proportional to 230,254.56, 317,746.47 and 128,279.88

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Solution

The fourth proportional to 230,254.56, 317,746.47 and 128,279.88 is: 177,023.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,254.56 : 317,746.47 = 128,279.88 : x
  2. Step 2: Convert to fraction form
    230,254.56/317,746.47 = 128,279.88/x
  3. Step 3: Cross multiply
    230,254.56x = 317,746.47 × 128,279.88
  4. Step 4: Simplify right side
    230,254.56x = 40,760,479,042.02
  5. Step 5: Solve for x
    x = 40,760,479,042.02/230,254.56
  6. Step 6: Final answer
    x = 177,023.55

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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.