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Finding the Fourth Proportional to 109,458.45, 151,052.84 and 61,711.67

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Solution

The fourth proportional to 109,458.45, 151,052.84 and 61,711.67 is: 85,162.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,458.45 : 151,052.84 = 61,711.67 : x
  2. Step 2: Convert to fraction form
    109,458.45/151,052.84 = 61,711.67/x
  3. Step 3: Cross multiply
    109,458.45x = 151,052.84 × 61,711.67
  4. Step 4: Simplify right side
    109,458.45x = 9,321,723,014.64
  5. Step 5: Solve for x
    x = 9,321,723,014.64/109,458.45
  6. Step 6: Final answer
    x = 85,162.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.