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Finding the Fourth Proportional to 98,979.50, 148,223.10 and 69,258.08

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Solution

The fourth proportional to 98,979.50, 148,223.10 and 69,258.08 is: 103,714.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,979.50 : 148,223.10 = 69,258.08 : x
  2. Step 2: Convert to fraction form
    98,979.50/148,223.10 = 69,258.08/x
  3. Step 3: Cross multiply
    98,979.50x = 148,223.10 × 69,258.08
  4. Step 4: Simplify right side
    98,979.50x = 10,265,647,317.65
  5. Step 5: Solve for x
    x = 10,265,647,317.65/98,979.50
  6. Step 6: Final answer
    x = 103,714.88

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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.