Home / 72,939.24-100,650.42-42,720.66

Finding the Fourth Proportional to 72,939.24, 100,650.42 and 42,720.66

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Solution

The fourth proportional to 72,939.24, 100,650.42 and 42,720.66 is: 58,951.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,939.24 : 100,650.42 = 42,720.66 : x
  2. Step 2: Convert to fraction form
    72,939.24/100,650.42 = 42,720.66/x
  3. Step 3: Cross multiply
    72,939.24x = 100,650.42 × 42,720.66
  4. Step 4: Simplify right side
    72,939.24x = 4,299,852,371.68
  5. Step 5: Solve for x
    x = 4,299,852,371.68/72,939.24
  6. Step 6: Final answer
    x = 58,951.15

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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.