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Finding the Fourth Proportional to 80,138.68, 120,267.08 and 38,018.89

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Solution

The fourth proportional to 80,138.68, 120,267.08 and 38,018.89 is: 57,056.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,138.68 : 120,267.08 = 38,018.89 : x
  2. Step 2: Convert to fraction form
    80,138.68/120,267.08 = 38,018.89/x
  3. Step 3: Cross multiply
    80,138.68x = 120,267.08 × 38,018.89
  4. Step 4: Simplify right side
    80,138.68x = 4,572,420,885.14
  5. Step 5: Solve for x
    x = 4,572,420,885.14/80,138.68
  6. Step 6: Final answer
    x = 57,056.35

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1.5x scale

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.