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Finding the Fourth Proportional to 71,482.70, 98,657.95 and 39,661.85

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Solution

The fourth proportional to 71,482.70, 98,657.95 and 39,661.85 is: 54,739.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,482.70 : 98,657.95 = 39,661.85 : x
  2. Step 2: Convert to fraction form
    71,482.70/98,657.95 = 39,661.85/x
  3. Step 3: Cross multiply
    71,482.70x = 98,657.95 × 39,661.85
  4. Step 4: Simplify right side
    71,482.70x = 3,912,956,320.92
  5. Step 5: Solve for x
    x = 3,912,956,320.92/71,482.70
  6. Step 6: Final answer
    x = 54,739.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.