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Finding the Fourth Proportional to 81,363.40, 122,117.10 and 48,041.80

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Solution

The fourth proportional to 81,363.40, 122,117.10 and 48,041.80 is: 72,105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,363.40 : 122,117.10 = 48,041.80 : x
  2. Step 2: Convert to fraction form
    81,363.40/122,117.10 = 48,041.80/x
  3. Step 3: Cross multiply
    81,363.40x = 122,117.10 × 48,041.80
  4. Step 4: Simplify right side
    81,363.40x = 5,866,725,294.78
  5. Step 5: Solve for x
    x = 5,866,725,294.78/81,363.40
  6. Step 6: Final answer
    x = 72,105.21

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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.