Home / 136,158.92-187,886.15-78,786.80

Finding the Fourth Proportional to 136,158.92, 187,886.15 and 78,786.80

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Solution

The fourth proportional to 136,158.92, 187,886.15 and 78,786.80 is: 108,718.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,158.92 : 187,886.15 = 78,786.80 : x
  2. Step 2: Convert to fraction form
    136,158.92/187,886.15 = 78,786.80/x
  3. Step 3: Cross multiply
    136,158.92x = 187,886.15 × 78,786.80
  4. Step 4: Simplify right side
    136,158.92x = 14,802,947,856.14
  5. Step 5: Solve for x
    x = 14,802,947,856.14/136,158.92
  6. Step 6: Final answer
    x = 108,718.16

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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.