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Finding the Fourth Proportional to 99,703.69, 137,604.29 and 63,408.55

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Solution

The fourth proportional to 99,703.69, 137,604.29 and 63,408.55 is: 87,512.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,703.69 : 137,604.29 = 63,408.55 : x
  2. Step 2: Convert to fraction form
    99,703.69/137,604.29 = 63,408.55/x
  3. Step 3: Cross multiply
    99,703.69x = 137,604.29 × 63,408.55
  4. Step 4: Simplify right side
    99,703.69x = 8,725,288,317.19
  5. Step 5: Solve for x
    x = 8,725,288,317.19/99,703.69
  6. Step 6: Final answer
    x = 87,512.19

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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.