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Finding the Fourth Proportional to 210,074.80, 315,112.20 and 121,501.30

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Solution

The fourth proportional to 210,074.80, 315,112.20 and 121,501.30 is: 182,251.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,074.80 : 315,112.20 = 121,501.30 : x
  2. Step 2: Convert to fraction form
    210,074.80/315,112.20 = 121,501.30/x
  3. Step 3: Cross multiply
    210,074.80x = 315,112.20 × 121,501.30
  4. Step 4: Simplify right side
    210,074.80x = 38,286,541,945.86
  5. Step 5: Solve for x
    x = 38,286,541,945.86/210,074.80
  6. Step 6: Final answer
    x = 182,251.95

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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.