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Finding the Fourth Proportional to 240,728.19, 332,204.31 and 138,752.84

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Solution

The fourth proportional to 240,728.19, 332,204.31 and 138,752.84 is: 191,478.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,728.19 : 332,204.31 = 138,752.84 : x
  2. Step 2: Convert to fraction form
    240,728.19/332,204.31 = 138,752.84/x
  3. Step 3: Cross multiply
    240,728.19x = 332,204.31 × 138,752.84
  4. Step 4: Simplify right side
    240,728.19x = 46,094,289,811.72
  5. Step 5: Solve for x
    x = 46,094,289,811.72/240,728.19
  6. Step 6: Final answer
    x = 191,478.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.