Home / 138,187.42-190,683.18-77,756.83

Finding the Fourth Proportional to 138,187.42, 190,683.18 and 77,756.83

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Solution

The fourth proportional to 138,187.42, 190,683.18 and 77,756.83 is: 107,295.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,187.42 : 190,683.18 = 77,756.83 : x
  2. Step 2: Convert to fraction form
    138,187.42/190,683.18 = 77,756.83/x
  3. Step 3: Cross multiply
    138,187.42x = 190,683.18 × 77,756.83
  4. Step 4: Simplify right side
    138,187.42x = 14,826,919,611.12
  5. Step 5: Solve for x
    x = 14,826,919,611.12/138,187.42
  6. Step 6: Final answer
    x = 107,295.73

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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.