Home / 143,767.98-198,397.17-78,357.36

Finding the Fourth Proportional to 143,767.98, 198,397.17 and 78,357.36

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Solution

The fourth proportional to 143,767.98, 198,397.17 and 78,357.36 is: 108,131.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,767.98 : 198,397.17 = 78,357.36 : x
  2. Step 2: Convert to fraction form
    143,767.98/198,397.17 = 78,357.36/x
  3. Step 3: Cross multiply
    143,767.98x = 198,397.17 × 78,357.36
  4. Step 4: Simplify right side
    143,767.98x = 15,545,878,472.67
  5. Step 5: Solve for x
    x = 15,545,878,472.67/143,767.98
  6. Step 6: Final answer
    x = 108,131.72

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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.