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Finding the Fourth Proportional to 272,043.70, 408,065.55 and 105,723.70

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Solution

The fourth proportional to 272,043.70, 408,065.55 and 105,723.70 is: 158,585.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,043.70 : 408,065.55 = 105,723.70 : x
  2. Step 2: Convert to fraction form
    272,043.70/408,065.55 = 105,723.70/x
  3. Step 3: Cross multiply
    272,043.70x = 408,065.55 × 105,723.70
  4. Step 4: Simplify right side
    272,043.70x = 43,142,199,788.54
  5. Step 5: Solve for x
    x = 43,142,199,788.54/272,043.70
  6. Step 6: Final answer
    x = 158,585.55

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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.