Home / 210,432.20-315,518.70-121,641.80

Finding the Fourth Proportional to 210,432.20, 315,518.70 and 121,641.80

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Solution

The fourth proportional to 210,432.20, 315,518.70 and 121,641.80 is: 182,387.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,432.20 : 315,518.70 = 121,641.80 : x
  2. Step 2: Convert to fraction form
    210,432.20/315,518.70 = 121,641.80/x
  3. Step 3: Cross multiply
    210,432.20x = 315,518.70 × 121,641.80
  4. Step 4: Simplify right side
    210,432.20x = 38,380,262,601.66
  5. Step 5: Solve for x
    x = 38,380,262,601.66/210,432.20
  6. Step 6: Final answer
    x = 182,387.78

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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.