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Finding the Fourth Proportional to 315,775.29, 435,769.23 and 172,536.36

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Solution

The fourth proportional to 315,775.29, 435,769.23 and 172,536.36 is: 238,099.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,775.29 : 435,769.23 = 172,536.36 : x
  2. Step 2: Convert to fraction form
    315,775.29/435,769.23 = 172,536.36/x
  3. Step 3: Cross multiply
    315,775.29x = 435,769.23 × 172,536.36
  4. Step 4: Simplify right side
    315,775.29x = 75,186,036,744.20
  5. Step 5: Solve for x
    x = 75,186,036,744.20/315,775.29
  6. Step 6: Final answer
    x = 238,099.81

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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.