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Finding the Fourth Proportional to 247,211.80, 370,769.10 and 80,999.80

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Solution

The fourth proportional to 247,211.80, 370,769.10 and 80,999.80 is: 121,483.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,211.80 : 370,769.10 = 80,999.80 : x
  2. Step 2: Convert to fraction form
    247,211.80/370,769.10 = 80,999.80/x
  3. Step 3: Cross multiply
    247,211.80x = 370,769.10 × 80,999.80
  4. Step 4: Simplify right side
    247,211.80x = 30,032,222,946.18
  5. Step 5: Solve for x
    x = 30,032,222,946.18/247,211.80
  6. Step 6: Final answer
    x = 121,483.78

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1.5x scale

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.