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Finding the Fourth Proportional to 315,753.78, 435,769.80 and 172,535.04

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Solution

The fourth proportional to 315,753.78, 435,769.80 and 172,535.04 is: 238,114.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,753.78 : 435,769.80 = 172,535.04 : x
  2. Step 2: Convert to fraction form
    315,753.78/435,769.80 = 172,535.04/x
  3. Step 3: Cross multiply
    315,753.78x = 435,769.80 × 172,535.04
  4. Step 4: Simplify right side
    315,753.78x = 75,185,559,873.79
  5. Step 5: Solve for x
    x = 75,185,559,873.79/315,753.78
  6. Step 6: Final answer
    x = 238,114.52

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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.