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Finding the Fourth Proportional to 231,610.56, 319,637.52 and 129,647.76

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Solution

The fourth proportional to 231,610.56, 319,637.52 and 129,647.76 is: 178,922.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,610.56 : 319,637.52 = 129,647.76 : x
  2. Step 2: Convert to fraction form
    231,610.56/319,637.52 = 129,647.76/x
  3. Step 3: Cross multiply
    231,610.56x = 319,637.52 × 129,647.76
  4. Step 4: Simplify right side
    231,610.56x = 41,440,288,479.96
  5. Step 5: Solve for x
    x = 41,440,288,479.96/231,610.56
  6. Step 6: Final answer
    x = 178,922.28

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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.