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Finding the Fourth Proportional to 231,130.88, 318,954.50 and 129,157.17

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Solution

The fourth proportional to 231,130.88, 318,954.50 and 129,157.17 is: 178,233.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,130.88 : 318,954.50 = 129,157.17 : x
  2. Step 2: Convert to fraction form
    231,130.88/318,954.50 = 129,157.17/x
  3. Step 3: Cross multiply
    231,130.88x = 318,954.50 × 129,157.17
  4. Step 4: Simplify right side
    231,130.88x = 41,195,260,578.77
  5. Step 5: Solve for x
    x = 41,195,260,578.77/231,130.88
  6. Step 6: Final answer
    x = 178,233.48

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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.