Home / 143,521.87-198,084.47-83,129.28

Finding the Fourth Proportional to 143,521.87, 198,084.47 and 83,129.28

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Solution

The fourth proportional to 143,521.87, 198,084.47 and 83,129.28 is: 114,732.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,521.87 : 198,084.47 = 83,129.28 : x
  2. Step 2: Convert to fraction form
    143,521.87/198,084.47 = 83,129.28/x
  3. Step 3: Cross multiply
    143,521.87x = 198,084.47 × 83,129.28
  4. Step 4: Simplify right side
    143,521.87x = 16,466,619,370.28
  5. Step 5: Solve for x
    x = 16,466,619,370.28/143,521.87
  6. Step 6: Final answer
    x = 114,732.48

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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.