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Finding the Fourth Proportional to 100,519.38, 138,719.39 and 55,200.29

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Solution

The fourth proportional to 100,519.38, 138,719.39 and 55,200.29 is: 76,177.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,519.38 : 138,719.39 = 55,200.29 : x
  2. Step 2: Convert to fraction form
    100,519.38/138,719.39 = 55,200.29/x
  3. Step 3: Cross multiply
    100,519.38x = 138,719.39 × 55,200.29
  4. Step 4: Simplify right side
    100,519.38x = 7,657,349,587.02
  5. Step 5: Solve for x
    x = 7,657,349,587.02/100,519.38
  6. Step 6: Final answer
    x = 76,177.84

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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.