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Finding the Fourth Proportional to 72,979.65, 109,432.98 and 33,503.09

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Solution

The fourth proportional to 72,979.65, 109,432.98 and 33,503.09 is: 50,237.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979.65 : 109,432.98 = 33,503.09 : x
  2. Step 2: Convert to fraction form
    72,979.65/109,432.98 = 33,503.09/x
  3. Step 3: Cross multiply
    72,979.65x = 109,432.98 × 33,503.09
  4. Step 4: Simplify right side
    72,979.65x = 3,666,342,430.74
  5. Step 5: Solve for x
    x = 3,666,342,430.74/72,979.65
  6. Step 6: Final answer
    x = 50,237.87

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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.