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Finding the Fourth Proportional to 99,773.26, 137,650.99 and 76,810.09

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Solution

The fourth proportional to 99,773.26, 137,650.99 and 76,810.09 is: 105,970.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,773.26 : 137,650.99 = 76,810.09 : x
  2. Step 2: Convert to fraction form
    99,773.26/137,650.99 = 76,810.09/x
  3. Step 3: Cross multiply
    99,773.26x = 137,650.99 × 76,810.09
  4. Step 4: Simplify right side
    99,773.26x = 10,572,984,930.49
  5. Step 5: Solve for x
    x = 10,572,984,930.49/99,773.26
  6. Step 6: Final answer
    x = 105,970.13

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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.