Home / 102,938.70-154,408.05-71,445.90

Finding the Fourth Proportional to 102,938.70, 154,408.05 and 71,445.90

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Solution

The fourth proportional to 102,938.70, 154,408.05 and 71,445.90 is: 107,168.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,938.70 : 154,408.05 = 71,445.90 : x
  2. Step 2: Convert to fraction form
    102,938.70/154,408.05 = 71,445.90/x
  3. Step 3: Cross multiply
    102,938.70x = 154,408.05 × 71,445.90
  4. Step 4: Simplify right side
    102,938.70x = 11,031,822,099.50
  5. Step 5: Solve for x
    x = 11,031,822,099.50/102,938.70
  6. Step 6: Final answer
    x = 107,168.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.