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Finding the Fourth Proportional to 103,876.20, 155,887.20 and 66,527.10

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Solution

The fourth proportional to 103,876.20, 155,887.20 and 66,527.10 is: 99,837.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,876.20 : 155,887.20 = 66,527.10 : x
  2. Step 2: Convert to fraction form
    103,876.20/155,887.20 = 66,527.10/x
  3. Step 3: Cross multiply
    103,876.20x = 155,887.20 × 66,527.10
  4. Step 4: Simplify right side
    103,876.20x = 10,370,723,343.12
  5. Step 5: Solve for x
    x = 10,370,723,343.12/103,876.20
  6. Step 6: Final answer
    x = 99,837.34

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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.