Home / 42,739.20-64,108.80-11,149.20

Finding the Fourth Proportional to 42,739.20, 64,108.80 and 11,149.20

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Solution

The fourth proportional to 42,739.20, 64,108.80 and 11,149.20 is: 16,723.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,739.20 : 64,108.80 = 11,149.20 : x
  2. Step 2: Convert to fraction form
    42,739.20/64,108.80 = 11,149.20/x
  3. Step 3: Cross multiply
    42,739.20x = 64,108.80 × 11,149.20
  4. Step 4: Simplify right side
    42,739.20x = 714,761,832.96
  5. Step 5: Solve for x
    x = 714,761,832.96/42,739.20
  6. Step 6: Final answer
    x = 16,723.80

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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.