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Finding the Fourth Proportional to 111,506.90, 153,821.37 and 68,496.08

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Solution

The fourth proportional to 111,506.90, 153,821.37 and 68,496.08 is: 94,488.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,506.90 : 153,821.37 = 68,496.08 : x
  2. Step 2: Convert to fraction form
    111,506.90/153,821.37 = 68,496.08/x
  3. Step 3: Cross multiply
    111,506.90x = 153,821.37 × 68,496.08
  4. Step 4: Simplify right side
    111,506.90x = 10,536,160,096.12
  5. Step 5: Solve for x
    x = 10,536,160,096.12/111,506.90
  6. Step 6: Final answer
    x = 94,488.87

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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.