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Finding the Fourth Proportional to 231,497.32, 319,478.67 and 129,516.67

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Solution

The fourth proportional to 231,497.32, 319,478.67 and 129,516.67 is: 178,739.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,497.32 : 319,478.67 = 129,516.67 : x
  2. Step 2: Convert to fraction form
    231,497.32/319,478.67 = 129,516.67/x
  3. Step 3: Cross multiply
    231,497.32x = 319,478.67 × 129,516.67
  4. Step 4: Simplify right side
    231,497.32x = 41,377,813,691.64
  5. Step 5: Solve for x
    x = 41,377,813,691.64/231,497.32
  6. Step 6: Final answer
    x = 178,739.93

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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.