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Finding the Fourth Proportional to 134,869.60, 202,255.80 and 68,287.60

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Solution

The fourth proportional to 134,869.60, 202,255.80 and 68,287.60 is: 102,406.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,869.60 : 202,255.80 = 68,287.60 : x
  2. Step 2: Convert to fraction form
    134,869.60/202,255.80 = 68,287.60/x
  3. Step 3: Cross multiply
    134,869.60x = 202,255.80 × 68,287.60
  4. Step 4: Simplify right side
    134,869.60x = 13,811,563,168.08
  5. Step 5: Solve for x
    x = 13,811,563,168.08/134,869.60
  6. Step 6: Final answer
    x = 102,406.79

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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.