Home / 80,861.40-121,364.10-47,539.80

Finding the Fourth Proportional to 80,861.40, 121,364.10 and 47,539.80

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Solution

The fourth proportional to 80,861.40, 121,364.10 and 47,539.80 is: 71,352.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861.40 : 121,364.10 = 47,539.80 : x
  2. Step 2: Convert to fraction form
    80,861.40/121,364.10 = 47,539.80/x
  3. Step 3: Cross multiply
    80,861.40x = 121,364.10 × 47,539.80
  4. Step 4: Simplify right side
    80,861.40x = 5,769,625,041.18
  5. Step 5: Solve for x
    x = 5,769,625,041.18/80,861.40
  6. Step 6: Final answer
    x = 71,352.03

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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.