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Finding the Fourth Proportional to 131,208.80, 196,861.80 and 42,465.20

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Solution

The fourth proportional to 131,208.80, 196,861.80 and 42,465.20 is: 63,713.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,208.80 : 196,861.80 = 42,465.20 : x
  2. Step 2: Convert to fraction form
    131,208.80/196,861.80 = 42,465.20/x
  3. Step 3: Cross multiply
    131,208.80x = 196,861.80 × 42,465.20
  4. Step 4: Simplify right side
    131,208.80x = 8,359,775,709.36
  5. Step 5: Solve for x
    x = 8,359,775,709.36/131,208.80
  6. Step 6: Final answer
    x = 63,713.53

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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.