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Finding the Fourth Proportional to 99,431.70, 137,176.54 and 73,653.05

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Solution

The fourth proportional to 99,431.70, 137,176.54 and 73,653.05 is: 101,612.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,431.70 : 137,176.54 = 73,653.05 : x
  2. Step 2: Convert to fraction form
    99,431.70/137,176.54 = 73,653.05/x
  3. Step 3: Cross multiply
    99,431.70x = 137,176.54 × 73,653.05
  4. Step 4: Simplify right side
    99,431.70x = 10,103,469,946.64
  5. Step 5: Solve for x
    x = 10,103,469,946.64/99,431.70
  6. Step 6: Final answer
    x = 101,612.16

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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.