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Finding the Fourth Proportional to 107,135.82, 147,863.79 and 68,390.37

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Solution

The fourth proportional to 107,135.82, 147,863.79 and 68,390.37 is: 94,389.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,135.82 : 147,863.79 = 68,390.37 : x
  2. Step 2: Convert to fraction form
    107,135.82/147,863.79 = 68,390.37/x
  3. Step 3: Cross multiply
    107,135.82x = 147,863.79 × 68,390.37
  4. Step 4: Simplify right side
    107,135.82x = 10,112,459,307.70
  5. Step 5: Solve for x
    x = 10,112,459,307.70/107,135.82
  6. Step 6: Final answer
    x = 94,389.15

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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.