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Finding the Fourth Proportional to 128,744.70, 193,246.65 and 62,238.30

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Solution

The fourth proportional to 128,744.70, 193,246.65 and 62,238.30 is: 93,420.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,744.70 : 193,246.65 = 62,238.30 : x
  2. Step 2: Convert to fraction form
    128,744.70/193,246.65 = 62,238.30/x
  3. Step 3: Cross multiply
    128,744.70x = 193,246.65 × 62,238.30
  4. Step 4: Simplify right side
    128,744.70x = 12,027,342,976.70
  5. Step 5: Solve for x
    x = 12,027,342,976.70/128,744.70
  6. Step 6: Final answer
    x = 93,420.10

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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.