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Finding the Fourth Proportional to 315,841.68, 435,870 and 172,600.56

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Solution

The fourth proportional to 315,841.68, 435,870 and 172,600.56 is: 238,193.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,841.68 : 435,870 = 172,600.56 : x
  2. Step 2: Convert to fraction form
    315,841.68/435,870 = 172,600.56/x
  3. Step 3: Cross multiply
    315,841.68x = 435,870 × 172,600.56
  4. Step 4: Simplify right side
    315,841.68x = 75,231,406,087.20
  5. Step 5: Solve for x
    x = 75,231,406,087.20/315,841.68
  6. Step 6: Final answer
    x = 238,193.41

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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.