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Finding the Fourth Proportional to 103,340.91, 142,626 and 63,078.06

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Solution

The fourth proportional to 103,340.91, 142,626 and 63,078.06 is: 87,057.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,340.91 : 142,626 = 63,078.06 : x
  2. Step 2: Convert to fraction form
    103,340.91/142,626 = 63,078.06/x
  3. Step 3: Cross multiply
    103,340.91x = 142,626 × 63,078.06
  4. Step 4: Simplify right side
    103,340.91x = 8,996,571,385.56
  5. Step 5: Solve for x
    x = 8,996,571,385.56/103,340.91
  6. Step 6: Final answer
    x = 87,057.21

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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.