Home / 131,291.10-196,677.45-78,543.90

Finding the Fourth Proportional to 131,291.10, 196,677.45 and 78,543.90

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Solution

The fourth proportional to 131,291.10, 196,677.45 and 78,543.90 is: 117,660.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,291.10 : 196,677.45 = 78,543.90 : x
  2. Step 2: Convert to fraction form
    131,291.10/196,677.45 = 78,543.90/x
  3. Step 3: Cross multiply
    131,291.10x = 196,677.45 × 78,543.90
  4. Step 4: Simplify right side
    131,291.10x = 15,447,813,965.06
  5. Step 5: Solve for x
    x = 15,447,813,965.06/131,291.10
  6. Step 6: Final answer
    x = 117,660.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.