Home / 231,130.25-318,953.64-129,156.55

Finding the Fourth Proportional to 231,130.25, 318,953.64 and 129,156.55

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Solution

The fourth proportional to 231,130.25, 318,953.64 and 129,156.55 is: 178,232.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,130.25 : 318,953.64 = 129,156.55 : x
  2. Step 2: Convert to fraction form
    231,130.25/318,953.64 = 129,156.55/x
  3. Step 3: Cross multiply
    231,130.25x = 318,953.64 × 129,156.55
  4. Step 4: Simplify right side
    231,130.25x = 41,194,952,151.03
  5. Step 5: Solve for x
    x = 41,194,952,151.03/231,130.25
  6. Step 6: Final answer
    x = 178,232.63

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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.