Home / 136,158.67-187,885.80-78,786.55

Finding the Fourth Proportional to 136,158.67, 187,885.80 and 78,786.55

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Solution

The fourth proportional to 136,158.67, 187,885.80 and 78,786.55 is: 108,717.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,158.67 : 187,885.80 = 78,786.55 : x
  2. Step 2: Convert to fraction form
    136,158.67/187,885.80 = 78,786.55/x
  3. Step 3: Cross multiply
    136,158.67x = 187,885.80 × 78,786.55
  4. Step 4: Simplify right side
    136,158.67x = 14,802,873,904.01
  5. Step 5: Solve for x
    x = 14,802,873,904.01/136,158.67
  6. Step 6: Final answer
    x = 108,717.82

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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.