Home / 143,878.69-198,545.30-79,359.15

Finding the Fourth Proportional to 143,878.69, 198,545.30 and 79,359.15

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Solution

The fourth proportional to 143,878.69, 198,545.30 and 79,359.15 is: 109,511.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,878.69 : 198,545.30 = 79,359.15 : x
  2. Step 2: Convert to fraction form
    143,878.69/198,545.30 = 79,359.15/x
  3. Step 3: Cross multiply
    143,878.69x = 198,545.30 × 79,359.15
  4. Step 4: Simplify right side
    143,878.69x = 15,756,386,244.50
  5. Step 5: Solve for x
    x = 15,756,386,244.50/143,878.69
  6. Step 6: Final answer
    x = 109,511.61

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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.