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Finding the Fourth Proportional to 111,056.40, 153,255.88 and 68,029.20

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Solution

The fourth proportional to 111,056.40, 153,255.88 and 68,029.20 is: 93,879.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,056.40 : 153,255.88 = 68,029.20 : x
  2. Step 2: Convert to fraction form
    111,056.40/153,255.88 = 68,029.20/x
  3. Step 3: Cross multiply
    111,056.40x = 153,255.88 × 68,029.20
  4. Step 4: Simplify right side
    111,056.40x = 10,425,874,911.70
  5. Step 5: Solve for x
    x = 10,425,874,911.70/111,056.40
  6. Step 6: Final answer
    x = 93,879.10

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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.