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Finding the Fourth Proportional to 103,512.50, 154,500.81 and 89,219.78

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Solution

The fourth proportional to 103,512.50, 154,500.81 and 89,219.78 is: 133,167.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,512.50 : 154,500.81 = 89,219.78 : x
  2. Step 2: Convert to fraction form
    103,512.50/154,500.81 = 89,219.78/x
  3. Step 3: Cross multiply
    103,512.50x = 154,500.81 × 89,219.78
  4. Step 4: Simplify right side
    103,512.50x = 13,784,528,278.02
  5. Step 5: Solve for x
    x = 13,784,528,278.02/103,512.50
  6. Step 6: Final answer
    x = 133,167.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.