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Finding the Fourth Proportional to 172,322.89, 237,770.39 and 100,689.08

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Solution

The fourth proportional to 172,322.89, 237,770.39 and 100,689.08 is: 138,930.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,322.89 : 237,770.39 = 100,689.08 : x
  2. Step 2: Convert to fraction form
    172,322.89/237,770.39 = 100,689.08/x
  3. Step 3: Cross multiply
    172,322.89x = 237,770.39 × 100,689.08
  4. Step 4: Simplify right side
    172,322.89x = 23,940,880,316.84
  5. Step 5: Solve for x
    x = 23,940,880,316.84/172,322.89
  6. Step 6: Final answer
    x = 138,930.35

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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.