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Finding the Fourth Proportional to 98,609.80, 147,914.70 and 68,429.20

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Solution

The fourth proportional to 98,609.80, 147,914.70 and 68,429.20 is: 102,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,609.80 : 147,914.70 = 68,429.20 : x
  2. Step 2: Convert to fraction form
    98,609.80/147,914.70 = 68,429.20/x
  3. Step 3: Cross multiply
    98,609.80x = 147,914.70 × 68,429.20
  4. Step 4: Simplify right side
    98,609.80x = 10,121,684,589.24
  5. Step 5: Solve for x
    x = 10,121,684,589.24/98,609.80
  6. Step 6: Final answer
    x = 102,643.80

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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.