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Finding the Fourth Proportional to 231,657.39, 319,669.54 and 129,659.49

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Solution

The fourth proportional to 231,657.39, 319,669.54 and 129,659.49 is: 178,920.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,657.39 : 319,669.54 = 129,659.49 : x
  2. Step 2: Convert to fraction form
    231,657.39/319,669.54 = 129,659.49/x
  3. Step 3: Cross multiply
    231,657.39x = 319,669.54 × 129,659.49
  4. Step 4: Simplify right side
    231,657.39x = 41,448,189,200.79
  5. Step 5: Solve for x
    x = 41,448,189,200.79/231,657.39
  6. Step 6: Final answer
    x = 178,920.21

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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.