Home / 143,780.74-198,418.20-83,387.19

Finding the Fourth Proportional to 143,780.74, 198,418.20 and 83,387.19

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Solution

The fourth proportional to 143,780.74, 198,418.20 and 83,387.19 is: 115,074.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,780.74 : 198,418.20 = 83,387.19 : x
  2. Step 2: Convert to fraction form
    143,780.74/198,418.20 = 83,387.19/x
  3. Step 3: Cross multiply
    143,780.74x = 198,418.20 × 83,387.19
  4. Step 4: Simplify right side
    143,780.74x = 16,545,535,711.49
  5. Step 5: Solve for x
    x = 16,545,535,711.49/143,780.74
  6. Step 6: Final answer
    x = 115,074.77

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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.