Home / 231,045.30-318,839-129,072.22

Finding the Fourth Proportional to 231,045.30, 318,839 and 129,072.22

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Solution

The fourth proportional to 231,045.30, 318,839 and 129,072.22 is: 178,117.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,045.30 : 318,839 = 129,072.22 : x
  2. Step 2: Convert to fraction form
    231,045.30/318,839 = 129,072.22/x
  3. Step 3: Cross multiply
    231,045.30x = 318,839 × 129,072.22
  4. Step 4: Simplify right side
    231,045.30x = 41,153,257,552.58
  5. Step 5: Solve for x
    x = 41,153,257,552.58/231,045.30
  6. Step 6: Final answer
    x = 178,117.70

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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.