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Finding the Fourth Proportional to 109,320.78, 150,863.50 and 61,569.66

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Solution

The fourth proportional to 109,320.78, 150,863.50 and 61,569.66 is: 84,966.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,320.78 : 150,863.50 = 61,569.66 : x
  2. Step 2: Convert to fraction form
    109,320.78/150,863.50 = 61,569.66/x
  3. Step 3: Cross multiply
    109,320.78x = 150,863.50 × 61,569.66
  4. Step 4: Simplify right side
    109,320.78x = 9,288,614,401.41
  5. Step 5: Solve for x
    x = 9,288,614,401.41/109,320.78
  6. Step 6: Final answer
    x = 84,966.59

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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.