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Finding the Fourth Proportional to 231,843.60, 319,948.20 and 129,868.20

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Solution

The fourth proportional to 231,843.60, 319,948.20 and 129,868.20 is: 179,220.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,843.60 : 319,948.20 = 129,868.20 : x
  2. Step 2: Convert to fraction form
    231,843.60/319,948.20 = 129,868.20/x
  3. Step 3: Cross multiply
    231,843.60x = 319,948.20 × 129,868.20
  4. Step 4: Simplify right side
    231,843.60x = 41,551,096,827.24
  5. Step 5: Solve for x
    x = 41,551,096,827.24/231,843.60
  6. Step 6: Final answer
    x = 179,220.37

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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.