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Finding the Fourth Proportional to 139,867.25, 209,596.75 and 69,649.97

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Solution

The fourth proportional to 139,867.25, 209,596.75 and 69,649.97 is: 104,373.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,867.25 : 209,596.75 = 69,649.97 : x
  2. Step 2: Convert to fraction form
    139,867.25/209,596.75 = 69,649.97/x
  3. Step 3: Cross multiply
    139,867.25x = 209,596.75 × 69,649.97
  4. Step 4: Simplify right side
    139,867.25x = 14,598,406,127.49
  5. Step 5: Solve for x
    x = 14,598,406,127.49/139,867.25
  6. Step 6: Final answer
    x = 104,373.30

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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.