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Finding the Fourth Proportional to 324,362.80, 486,543.05 and 87,705.46

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Solution

The fourth proportional to 324,362.80, 486,543.05 and 87,705.46 is: 131,557.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,362.80 : 486,543.05 = 87,705.46 : x
  2. Step 2: Convert to fraction form
    324,362.80/486,543.05 = 87,705.46/x
  3. Step 3: Cross multiply
    324,362.80x = 486,543.05 × 87,705.46
  4. Step 4: Simplify right side
    324,362.80x = 42,672,482,010.05
  5. Step 5: Solve for x
    x = 42,672,482,010.05/324,362.80
  6. Step 6: Final answer
    x = 131,557.88

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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.