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Finding the Fourth Proportional to 315,793.18, 435,789.40 and 172,550.14

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Solution

The fourth proportional to 315,793.18, 435,789.40 and 172,550.14 is: 238,116.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,793.18 : 435,789.40 = 172,550.14 : x
  2. Step 2: Convert to fraction form
    315,793.18/435,789.40 = 172,550.14/x
  3. Step 3: Cross multiply
    315,793.18x = 435,789.40 × 172,550.14
  4. Step 4: Simplify right side
    315,793.18x = 75,195,521,980.52
  5. Step 5: Solve for x
    x = 75,195,521,980.52/315,793.18
  6. Step 6: Final answer
    x = 238,116.36

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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.