Home / 136,221.20-187,982.32-78,862.95

Finding the Fourth Proportional to 136,221.20, 187,982.32 and 78,862.95

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Solution

The fourth proportional to 136,221.20, 187,982.32 and 78,862.95 is: 108,829.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,221.20 : 187,982.32 = 78,862.95 : x
  2. Step 2: Convert to fraction form
    136,221.20/187,982.32 = 78,862.95/x
  3. Step 3: Cross multiply
    136,221.20x = 187,982.32 × 78,862.95
  4. Step 4: Simplify right side
    136,221.20x = 14,824,840,303.04
  5. Step 5: Solve for x
    x = 14,824,840,303.04/136,221.20
  6. Step 6: Final answer
    x = 108,829.17

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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.