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Finding the Fourth Proportional to 68,911.66, 95,112.90 and 42,048.40

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Solution

The fourth proportional to 68,911.66, 95,112.90 and 42,048.40 is: 58,035.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,911.66 : 95,112.90 = 42,048.40 : x
  2. Step 2: Convert to fraction form
    68,911.66/95,112.90 = 42,048.40/x
  3. Step 3: Cross multiply
    68,911.66x = 95,112.90 × 42,048.40
  4. Step 4: Simplify right side
    68,911.66x = 3,999,345,264.36
  5. Step 5: Solve for x
    x = 3,999,345,264.36/68,911.66
  6. Step 6: Final answer
    x = 58,035.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.