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Finding the Fourth Proportional to 68,811.12, 103,041.72 and 45,366.48

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Solution

The fourth proportional to 68,811.12, 103,041.72 and 45,366.48 is: 67,934.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,811.12 : 103,041.72 = 45,366.48 : x
  2. Step 2: Convert to fraction form
    68,811.12/103,041.72 = 45,366.48/x
  3. Step 3: Cross multiply
    68,811.12x = 103,041.72 × 45,366.48
  4. Step 4: Simplify right side
    68,811.12x = 4,674,640,129.55
  5. Step 5: Solve for x
    x = 4,674,640,129.55/68,811.12
  6. Step 6: Final answer
    x = 67,934.37

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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.