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Finding the Fourth Proportional to 98,643.56, 148,286.10 and 79,135.52

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Solution

The fourth proportional to 98,643.56, 148,286.10 and 79,135.52 is: 118,960.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,643.56 : 148,286.10 = 79,135.52 : x
  2. Step 2: Convert to fraction form
    98,643.56/148,286.10 = 79,135.52/x
  3. Step 3: Cross multiply
    98,643.56x = 148,286.10 × 79,135.52
  4. Step 4: Simplify right side
    98,643.56x = 11,734,697,632.27
  5. Step 5: Solve for x
    x = 11,734,697,632.27/98,643.56
  6. Step 6: Final answer
    x = 118,960.61

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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.