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Finding the Fourth Proportional to 140,649.97, 210,981.75 and 45,879.97

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Solution

The fourth proportional to 140,649.97, 210,981.75 and 45,879.97 is: 68,822.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,649.97 : 210,981.75 = 45,879.97 : x
  2. Step 2: Convert to fraction form
    140,649.97/210,981.75 = 45,879.97/x
  3. Step 3: Cross multiply
    140,649.97x = 210,981.75 × 45,879.97
  4. Step 4: Simplify right side
    140,649.97x = 9,679,836,250.19
  5. Step 5: Solve for x
    x = 9,679,836,250.19/140,649.97
  6. Step 6: Final answer
    x = 68,822.17

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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.