Home / 100,239.15-138,328.85-54,297.92

Finding the Fourth Proportional to 100,239.15, 138,328.85 and 54,297.92

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Solution

The fourth proportional to 100,239.15, 138,328.85 and 54,297.92 is: 74,930.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,239.15 : 138,328.85 = 54,297.92 : x
  2. Step 2: Convert to fraction form
    100,239.15/138,328.85 = 54,297.92/x
  3. Step 3: Cross multiply
    100,239.15x = 138,328.85 × 54,297.92
  4. Step 4: Simplify right side
    100,239.15x = 7,510,969,176.81
  5. Step 5: Solve for x
    x = 7,510,969,176.81/100,239.15
  6. Step 6: Final answer
    x = 74,930.50

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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.