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Finding the Fourth Proportional to 69,139.90, 103,636.95 and 27,003.70

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Solution

The fourth proportional to 69,139.90, 103,636.95 and 27,003.70 is: 40,477.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,139.90 : 103,636.95 = 27,003.70 : x
  2. Step 2: Convert to fraction form
    69,139.90/103,636.95 = 27,003.70/x
  3. Step 3: Cross multiply
    69,139.90x = 103,636.95 × 27,003.70
  4. Step 4: Simplify right side
    69,139.90x = 2,798,581,106.72
  5. Step 5: Solve for x
    x = 2,798,581,106.72/69,139.90
  6. Step 6: Final answer
    x = 40,477.08

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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.