Home / 136,220.96-187,982-78,862.71

Finding the Fourth Proportional to 136,220.96, 187,982 and 78,862.71

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Solution

The fourth proportional to 136,220.96, 187,982 and 78,862.71 is: 108,828.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,220.96 : 187,982 = 78,862.71 : x
  2. Step 2: Convert to fraction form
    136,220.96/187,982 = 78,862.71/x
  3. Step 3: Cross multiply
    136,220.96x = 187,982 × 78,862.71
  4. Step 4: Simplify right side
    136,220.96x = 14,824,769,951.22
  5. Step 5: Solve for x
    x = 14,824,769,951.22/136,220.96
  6. Step 6: Final answer
    x = 108,828.85

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1.5x scale

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.