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Finding the Fourth Proportional to 109,161.77, 150,593.47 and 78,899.15

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Solution

The fourth proportional to 109,161.77, 150,593.47 and 78,899.15 is: 108,844.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,161.77 : 150,593.47 = 78,899.15 : x
  2. Step 2: Convert to fraction form
    109,161.77/150,593.47 = 78,899.15/x
  3. Step 3: Cross multiply
    109,161.77x = 150,593.47 × 78,899.15
  4. Step 4: Simplify right side
    109,161.77x = 11,881,696,957.79
  5. Step 5: Solve for x
    x = 11,881,696,957.79/109,161.77
  6. Step 6: Final answer
    x = 108,844.86

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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.