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Finding the Fourth Proportional to 91,374.84, 137,010.42 and 66,699

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Solution

The fourth proportional to 91,374.84, 137,010.42 and 66,699 is: 100,010.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,374.84 : 137,010.42 = 66,699 : x
  2. Step 2: Convert to fraction form
    91,374.84/137,010.42 = 66,699/x
  3. Step 3: Cross multiply
    91,374.84x = 137,010.42 × 66,699
  4. Step 4: Simplify right side
    91,374.84x = 9,138,458,003.58
  5. Step 5: Solve for x
    x = 9,138,458,003.58/91,374.84
  6. Step 6: Final answer
    x = 100,010.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.