Home / 67,177.48-100,780.78-20,429.12

Finding the Fourth Proportional to 67,177.48, 100,780.78 and 20,429.12

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Solution

The fourth proportional to 67,177.48, 100,780.78 and 20,429.12 is: 30,648.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,177.48 : 100,780.78 = 20,429.12 : x
  2. Step 2: Convert to fraction form
    67,177.48/100,780.78 = 20,429.12/x
  3. Step 3: Cross multiply
    67,177.48x = 100,780.78 × 20,429.12
  4. Step 4: Simplify right side
    67,177.48x = 2,058,862,648.31
  5. Step 5: Solve for x
    x = 2,058,862,648.31/67,177.48
  6. Step 6: Final answer
    x = 30,648.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.