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Finding the Fourth Proportional to 231,713.80, 319,769.90 and 131,111.80

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Solution

The fourth proportional to 231,713.80, 319,769.90 and 131,111.80 is: 180,937.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,713.80 : 319,769.90 = 131,111.80 : x
  2. Step 2: Convert to fraction form
    231,713.80/319,769.90 = 131,111.80/x
  3. Step 3: Cross multiply
    231,713.80x = 319,769.90 × 131,111.80
  4. Step 4: Simplify right side
    231,713.80x = 41,925,607,174.82
  5. Step 5: Solve for x
    x = 41,925,607,174.82/231,713.80
  6. Step 6: Final answer
    x = 180,937.03

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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.