Home / 231,158.21-318,957.75-129,151.06

Finding the Fourth Proportional to 231,158.21, 318,957.75 and 129,151.06

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Solution

The fourth proportional to 231,158.21, 318,957.75 and 129,151.06 is: 178,205.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,158.21 : 318,957.75 = 129,151.06 : x
  2. Step 2: Convert to fraction form
    231,158.21/318,957.75 = 129,151.06/x
  3. Step 3: Cross multiply
    231,158.21x = 318,957.75 × 129,151.06
  4. Step 4: Simplify right side
    231,158.21x = 41,193,730,710.32
  5. Step 5: Solve for x
    x = 41,193,730,710.32/231,158.21
  6. Step 6: Final answer
    x = 178,205.79

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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.