Home / 100,090.28-138,123.40-54,767.74

Finding the Fourth Proportional to 100,090.28, 138,123.40 and 54,767.74

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Solution

The fourth proportional to 100,090.28, 138,123.40 and 54,767.74 is: 75,578.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,090.28 : 138,123.40 = 54,767.74 : x
  2. Step 2: Convert to fraction form
    100,090.28/138,123.40 = 54,767.74/x
  3. Step 3: Cross multiply
    100,090.28x = 138,123.40 × 54,767.74
  4. Step 4: Simplify right side
    100,090.28x = 7,564,706,459.12
  5. Step 5: Solve for x
    x = 7,564,706,459.12/100,090.28
  6. Step 6: Final answer
    x = 75,578.83

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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.