Home / 131,968.40-198,001.20-53,139.20

Finding the Fourth Proportional to 131,968.40, 198,001.20 and 53,139.20

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Solution

The fourth proportional to 131,968.40, 198,001.20 and 53,139.20 is: 79,728.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,968.40 : 198,001.20 = 53,139.20 : x
  2. Step 2: Convert to fraction form
    131,968.40/198,001.20 = 53,139.20/x
  3. Step 3: Cross multiply
    131,968.40x = 198,001.20 × 53,139.20
  4. Step 4: Simplify right side
    131,968.40x = 10,521,625,367.04
  5. Step 5: Solve for x
    x = 10,521,625,367.04/131,968.40
  6. Step 6: Final answer
    x = 79,728.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.