Home / 100,135.50-138,187.20-54,816.39

Finding the Fourth Proportional to 100,135.50, 138,187.20 and 54,816.39

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Solution

The fourth proportional to 100,135.50, 138,187.20 and 54,816.39 is: 75,646.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,135.50 : 138,187.20 = 54,816.39 : x
  2. Step 2: Convert to fraction form
    100,135.50/138,187.20 = 54,816.39/x
  3. Step 3: Cross multiply
    100,135.50x = 138,187.20 × 54,816.39
  4. Step 4: Simplify right side
    100,135.50x = 7,574,923,448.21
  5. Step 5: Solve for x
    x = 7,574,923,448.21/100,135.50
  6. Step 6: Final answer
    x = 75,646.73

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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.