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Finding the Fourth Proportional to 138,808.26, 208,208.61 and 38,969.28

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Solution

The fourth proportional to 138,808.26, 208,208.61 and 38,969.28 is: 58,452.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,808.26 : 208,208.61 = 38,969.28 : x
  2. Step 2: Convert to fraction form
    138,808.26/208,208.61 = 38,969.28/x
  3. Step 3: Cross multiply
    138,808.26x = 208,208.61 × 38,969.28
  4. Step 4: Simplify right side
    138,808.26x = 8,113,739,621.50
  5. Step 5: Solve for x
    x = 8,113,739,621.50/138,808.26
  6. Step 6: Final answer
    x = 58,452.86

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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.