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Finding the Fourth Proportional to 76,932, 115,398 and 21,528

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Solution

The fourth proportional to 76,932, 115,398 and 21,528 is: 32,292

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,932 : 115,398 = 21,528 : x
  2. Step 2: Convert to fraction form
    76,932/115,398 = 21,528/x
  3. Step 3: Cross multiply
    76,932x = 115,398 × 21,528
  4. Step 4: Simplify right side
    76,932x = 2,484,288,144
  5. Step 5: Solve for x
    x = 2,484,288,144/76,932
  6. Step 6: Final answer
    x = 32,292

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.