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Finding the Fourth Proportional to 80,798.40, 121,269.60 and 47,476.80

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Solution

The fourth proportional to 80,798.40, 121,269.60 and 47,476.80 is: 71,257.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,798.40 : 121,269.60 = 47,476.80 : x
  2. Step 2: Convert to fraction form
    80,798.40/121,269.60 = 47,476.80/x
  3. Step 3: Cross multiply
    80,798.40x = 121,269.60 × 47,476.80
  4. Step 4: Simplify right side
    80,798.40x = 5,757,492,545.28
  5. Step 5: Solve for x
    x = 5,757,492,545.28/80,798.40
  6. Step 6: Final answer
    x = 71,257.51

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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.