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Finding the Fourth Proportional to 231,778.55, 319,866.21 and 129,798.03

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Solution

The fourth proportional to 231,778.55, 319,866.21 and 129,798.03 is: 179,127.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,778.55 : 319,866.21 = 129,798.03 : x
  2. Step 2: Convert to fraction form
    231,778.55/319,866.21 = 129,798.03/x
  3. Step 3: Cross multiply
    231,778.55x = 319,866.21 × 129,798.03
  4. Step 4: Simplify right side
    231,778.55x = 41,518,003,921.57
  5. Step 5: Solve for x
    x = 41,518,003,921.57/231,778.55
  6. Step 6: Final answer
    x = 179,127.90

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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.