Home / 100,177.72-138,248.56-54,857.62

Finding the Fourth Proportional to 100,177.72, 138,248.56 and 54,857.62

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Solution

The fourth proportional to 100,177.72, 138,248.56 and 54,857.62 is: 75,705.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,177.72 : 138,248.56 = 54,857.62 : x
  2. Step 2: Convert to fraction form
    100,177.72/138,248.56 = 54,857.62/x
  3. Step 3: Cross multiply
    100,177.72x = 138,248.56 × 54,857.62
  4. Step 4: Simplify right side
    100,177.72x = 7,583,986,970.03
  5. Step 5: Solve for x
    x = 7,583,986,970.03/100,177.72
  6. Step 6: Final answer
    x = 75,705.33

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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.