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Finding the Fourth Proportional to 43,959.95, 65,939.70 and 15,879.98

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Solution

The fourth proportional to 43,959.95, 65,939.70 and 15,879.98 is: 23,819.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,959.95 : 65,939.70 = 15,879.98 : x
  2. Step 2: Convert to fraction form
    43,959.95/65,939.70 = 15,879.98/x
  3. Step 3: Cross multiply
    43,959.95x = 65,939.70 × 15,879.98
  4. Step 4: Simplify right side
    43,959.95x = 1,047,121,341.61
  5. Step 5: Solve for x
    x = 1,047,121,341.61/43,959.95
  6. Step 6: Final answer
    x = 23,819.89

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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.