Home / 72,685.15-109,027.35-19,382.66

Finding the Fourth Proportional to 72,685.15, 109,027.35 and 19,382.66

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Solution

The fourth proportional to 72,685.15, 109,027.35 and 19,382.66 is: 29,073.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,685.15 : 109,027.35 = 19,382.66 : x
  2. Step 2: Convert to fraction form
    72,685.15/109,027.35 = 19,382.66/x
  3. Step 3: Cross multiply
    72,685.15x = 109,027.35 × 19,382.66
  4. Step 4: Simplify right side
    72,685.15x = 2,113,239,919.47
  5. Step 5: Solve for x
    x = 2,113,239,919.47/72,685.15
  6. Step 6: Final answer
    x = 29,073.89

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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.