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Finding the Fourth Proportional to 99,803.97, 137,774.39 and 65,832.57

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Solution

The fourth proportional to 99,803.97, 137,774.39 and 65,832.57 is: 90,878.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,803.97 : 137,774.39 = 65,832.57 : x
  2. Step 2: Convert to fraction form
    99,803.97/137,774.39 = 65,832.57/x
  3. Step 3: Cross multiply
    99,803.97x = 137,774.39 × 65,832.57
  4. Step 4: Simplify right side
    99,803.97x = 9,070,041,844.72
  5. Step 5: Solve for x
    x = 9,070,041,844.72/99,803.97
  6. Step 6: Final answer
    x = 90,878.57

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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.