Home / 143,280.11-197,716.95-78,747.95

Finding the Fourth Proportional to 143,280.11, 197,716.95 and 78,747.95

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Solution

The fourth proportional to 143,280.11, 197,716.95 and 78,747.95 is: 108,666.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,280.11 : 197,716.95 = 78,747.95 : x
  2. Step 2: Convert to fraction form
    143,280.11/197,716.95 = 78,747.95/x
  3. Step 3: Cross multiply
    143,280.11x = 197,716.95 × 78,747.95
  4. Step 4: Simplify right side
    143,280.11x = 15,569,804,987.04
  5. Step 5: Solve for x
    x = 15,569,804,987.04/143,280.11
  6. Step 6: Final answer
    x = 108,666.90

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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.