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Finding the Fourth Proportional to 68,335.20, 102,502.80 and 38,810.70

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Solution

The fourth proportional to 68,335.20, 102,502.80 and 38,810.70 is: 58,216.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,335.20 : 102,502.80 = 38,810.70 : x
  2. Step 2: Convert to fraction form
    68,335.20/102,502.80 = 38,810.70/x
  3. Step 3: Cross multiply
    68,335.20x = 102,502.80 × 38,810.70
  4. Step 4: Simplify right side
    68,335.20x = 3,978,205,419.96
  5. Step 5: Solve for x
    x = 3,978,205,419.96/68,335.20
  6. Step 6: Final answer
    x = 58,216.05

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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.