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Finding the Fourth Proportional to 230,366.34, 317,900.70 and 128,391.30

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Solution

The fourth proportional to 230,366.34, 317,900.70 and 128,391.30 is: 177,177.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,366.34 : 317,900.70 = 128,391.30 : x
  2. Step 2: Convert to fraction form
    230,366.34/317,900.70 = 128,391.30/x
  3. Step 3: Cross multiply
    230,366.34x = 317,900.70 × 128,391.30
  4. Step 4: Simplify right side
    230,366.34x = 40,815,684,143.91
  5. Step 5: Solve for x
    x = 40,815,684,143.91/230,366.34
  6. Step 6: Final answer
    x = 177,177.29

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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.