Home / 72,012.15-108,023.99-19,420.88

Finding the Fourth Proportional to 72,012.15, 108,023.99 and 19,420.88

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Solution

The fourth proportional to 72,012.15, 108,023.99 and 19,420.88 is: 29,132.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,012.15 : 108,023.99 = 19,420.88 : x
  2. Step 2: Convert to fraction form
    72,012.15/108,023.99 = 19,420.88/x
  3. Step 3: Cross multiply
    72,012.15x = 108,023.99 × 19,420.88
  4. Step 4: Simplify right side
    72,012.15x = 2,097,920,309.69
  5. Step 5: Solve for x
    x = 2,097,920,309.69/72,012.15
  6. Step 6: Final answer
    x = 29,132.87

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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.