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Finding the Fourth Proportional to 68,387.50, 94,390.50 and 40,102.30

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Solution

The fourth proportional to 68,387.50, 94,390.50 and 40,102.30 is: 55,350.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,387.50 : 94,390.50 = 40,102.30 : x
  2. Step 2: Convert to fraction form
    68,387.50/94,390.50 = 40,102.30/x
  3. Step 3: Cross multiply
    68,387.50x = 94,390.50 × 40,102.30
  4. Step 4: Simplify right side
    68,387.50x = 3,785,276,416.52
  5. Step 5: Solve for x
    x = 3,785,276,416.52/68,387.50
  6. Step 6: Final answer
    x = 55,350.41

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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.