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Finding the Fourth Proportional to 111,137.92, 153,395.32 and 70,843.68

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Solution

The fourth proportional to 111,137.92, 153,395.32 and 70,843.68 is: 97,780.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,137.92 : 153,395.32 = 70,843.68 : x
  2. Step 2: Convert to fraction form
    111,137.92/153,395.32 = 70,843.68/x
  3. Step 3: Cross multiply
    111,137.92x = 153,395.32 × 70,843.68
  4. Step 4: Simplify right side
    111,137.92x = 10,867,088,963.58
  5. Step 5: Solve for x
    x = 10,867,088,963.58/111,137.92
  6. Step 6: Final answer
    x = 97,780.21

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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.