Home / 80,430.12-120,665.43-47,178

Finding the Fourth Proportional to 80,430.12, 120,665.43 and 47,178

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Solution

The fourth proportional to 80,430.12, 120,665.43 and 47,178 is: 70,778.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,430.12 : 120,665.43 = 47,178 : x
  2. Step 2: Convert to fraction form
    80,430.12/120,665.43 = 47,178/x
  3. Step 3: Cross multiply
    80,430.12x = 120,665.43 × 47,178
  4. Step 4: Simplify right side
    80,430.12x = 5,692,753,656.54
  5. Step 5: Solve for x
    x = 5,692,753,656.54/80,430.12
  6. Step 6: Final answer
    x = 70,778.88

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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.