Home / 143,166.57-197,572.25-78,641.78

Finding the Fourth Proportional to 143,166.57, 197,572.25 and 78,641.78

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Solution

The fourth proportional to 143,166.57, 197,572.25 and 78,641.78 is: 108,526.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,166.57 : 197,572.25 = 78,641.78 : x
  2. Step 2: Convert to fraction form
    143,166.57/197,572.25 = 78,641.78/x
  3. Step 3: Cross multiply
    143,166.57x = 197,572.25 × 78,641.78
  4. Step 4: Simplify right side
    143,166.57x = 15,537,432,037.53
  5. Step 5: Solve for x
    x = 15,537,432,037.53/143,166.57
  6. Step 6: Final answer
    x = 108,526.96

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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.