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Finding the Fourth Proportional to 99,641.21, 137,427.03 and 63,834.62

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Solution

The fourth proportional to 99,641.21, 137,427.03 and 63,834.62 is: 88,041.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,641.21 : 137,427.03 = 63,834.62 : x
  2. Step 2: Convert to fraction form
    99,641.21/137,427.03 = 63,834.62/x
  3. Step 3: Cross multiply
    99,641.21x = 137,427.03 × 63,834.62
  4. Step 4: Simplify right side
    99,641.21x = 8,772,601,550.64
  5. Step 5: Solve for x
    x = 8,772,601,550.64/99,641.21
  6. Step 6: Final answer
    x = 88,041.91

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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.