Home / 140,109.30-193,355.10-79,688.64

Finding the Fourth Proportional to 140,109.30, 193,355.10 and 79,688.64

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Solution

The fourth proportional to 140,109.30, 193,355.10 and 79,688.64 is: 109,972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,109.30 : 193,355.10 = 79,688.64 : x
  2. Step 2: Convert to fraction form
    140,109.30/193,355.10 = 79,688.64/x
  3. Step 3: Cross multiply
    140,109.30x = 193,355.10 × 79,688.64
  4. Step 4: Simplify right side
    140,109.30x = 15,408,204,956.06
  5. Step 5: Solve for x
    x = 15,408,204,956.06/140,109.30
  6. Step 6: Final answer
    x = 109,972.75

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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.