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Finding the Fourth Proportional to 231,010.98, 318,791.70 and 129,038.28

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Solution

The fourth proportional to 231,010.98, 318,791.70 and 129,038.28 is: 178,070.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,010.98 : 318,791.70 = 129,038.28 : x
  2. Step 2: Convert to fraction form
    231,010.98/318,791.70 = 129,038.28/x
  3. Step 3: Cross multiply
    231,010.98x = 318,791.70 × 129,038.28
  4. Step 4: Simplify right side
    231,010.98x = 41,136,332,646.28
  5. Step 5: Solve for x
    x = 41,136,332,646.28/231,010.98
  6. Step 6: Final answer
    x = 178,070.90

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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.