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Finding the Fourth Proportional to 231,657.92, 319,660.96 and 129,688.96

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Solution

The fourth proportional to 231,657.92, 319,660.96 and 129,688.96 is: 178,955.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,657.92 : 319,660.96 = 129,688.96 : x
  2. Step 2: Convert to fraction form
    231,657.92/319,660.96 = 129,688.96/x
  3. Step 3: Cross multiply
    231,657.92x = 319,660.96 × 129,688.96
  4. Step 4: Simplify right side
    231,657.92x = 41,456,497,455.00
  5. Step 5: Solve for x
    x = 41,456,497,455.00/231,657.92
  6. Step 6: Final answer
    x = 178,955.67

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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.