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Finding the Fourth Proportional to 230,013.72, 317,418.87 and 128,036.97

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Solution

The fourth proportional to 230,013.72, 317,418.87 and 128,036.97 is: 176,690.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,013.72 : 317,418.87 = 128,036.97 : x
  2. Step 2: Convert to fraction form
    230,013.72/317,418.87 = 128,036.97/x
  3. Step 3: Cross multiply
    230,013.72x = 317,418.87 × 128,036.97
  4. Step 4: Simplify right side
    230,013.72x = 40,641,350,335.62
  5. Step 5: Solve for x
    x = 40,641,350,335.62/230,013.72
  6. Step 6: Final answer
    x = 176,690.98

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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.