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Finding the Fourth Proportional to 99,748.50, 137,703.11 and 63,486.43

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Solution

The fourth proportional to 99,748.50, 137,703.11 and 63,486.43 is: 87,643.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,748.50 : 137,703.11 = 63,486.43 : x
  2. Step 2: Convert to fraction form
    99,748.50/137,703.11 = 63,486.43/x
  3. Step 3: Cross multiply
    99,748.50x = 137,703.11 × 63,486.43
  4. Step 4: Simplify right side
    99,748.50x = 8,742,278,853.80
  5. Step 5: Solve for x
    x = 8,742,278,853.80/99,748.50
  6. Step 6: Final answer
    x = 87,643.21

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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.