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Finding the Fourth Proportional to 216,501.78, 324,671.90 and 74,306.71

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Solution

The fourth proportional to 216,501.78, 324,671.90 and 74,306.71 is: 111,432.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,501.78 : 324,671.90 = 74,306.71 : x
  2. Step 2: Convert to fraction form
    216,501.78/324,671.90 = 74,306.71/x
  3. Step 3: Cross multiply
    216,501.78x = 324,671.90 × 74,306.71
  4. Step 4: Simplify right side
    216,501.78x = 24,125,299,344.45
  5. Step 5: Solve for x
    x = 24,125,299,344.45/216,501.78
  6. Step 6: Final answer
    x = 111,432.34

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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.