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Finding the Fourth Proportional to 103,551.54, 142,763.49 and 67,679.88

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Solution

The fourth proportional to 103,551.54, 142,763.49 and 67,679.88 is: 93,308.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,551.54 : 142,763.49 = 67,679.88 : x
  2. Step 2: Convert to fraction form
    103,551.54/142,763.49 = 67,679.88/x
  3. Step 3: Cross multiply
    103,551.54x = 142,763.49 × 67,679.88
  4. Step 4: Simplify right side
    103,551.54x = 9,662,215,871.58
  5. Step 5: Solve for x
    x = 9,662,215,871.58/103,551.54
  6. Step 6: Final answer
    x = 93,308.28

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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.