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Finding the Fourth Proportional to 235,484, 324,967.92 and 129,500

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Solution

The fourth proportional to 235,484, 324,967.92 and 129,500 is: 178,710

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,484 : 324,967.92 = 129,500 : x
  2. Step 2: Convert to fraction form
    235,484/324,967.92 = 129,500/x
  3. Step 3: Cross multiply
    235,484x = 324,967.92 × 129,500
  4. Step 4: Simplify right side
    235,484x = 42,083,345,640
  5. Step 5: Solve for x
    x = 42,083,345,640/235,484
  6. Step 6: Final answer
    x = 178,710

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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.