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Finding the Fourth Proportional to 100,643.17, 138,894.83 and 60,356.20

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Solution

The fourth proportional to 100,643.17, 138,894.83 and 60,356.20 is: 83,295.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,643.17 : 138,894.83 = 60,356.20 : x
  2. Step 2: Convert to fraction form
    100,643.17/138,894.83 = 60,356.20/x
  3. Step 3: Cross multiply
    100,643.17x = 138,894.83 × 60,356.20
  4. Step 4: Simplify right side
    100,643.17x = 8,383,164,138.45
  5. Step 5: Solve for x
    x = 8,383,164,138.45/100,643.17
  6. Step 6: Final answer
    x = 83,295.91

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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.