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Finding the Fourth Proportional to 372,065.50, 558,346.42 and 135,408.11

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Solution

The fourth proportional to 372,065.50, 558,346.42 and 135,408.11 is: 203,202.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,065.50 : 558,346.42 = 135,408.11 : x
  2. Step 2: Convert to fraction form
    372,065.50/558,346.42 = 135,408.11/x
  3. Step 3: Cross multiply
    372,065.50x = 558,346.42 × 135,408.11
  4. Step 4: Simplify right side
    372,065.50x = 75,604,630,073.32
  5. Step 5: Solve for x
    x = 75,604,630,073.32/372,065.50
  6. Step 6: Final answer
    x = 203,202.47

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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.