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Finding the Fourth Proportional to 91,606, 137,428.60 and 28,424.76

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Solution

The fourth proportional to 91,606, 137,428.60 and 28,424.76 is: 42,643.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,606 : 137,428.60 = 28,424.76 : x
  2. Step 2: Convert to fraction form
    91,606/137,428.60 = 28,424.76/x
  3. Step 3: Cross multiply
    91,606x = 137,428.60 × 28,424.76
  4. Step 4: Simplify right side
    91,606x = 3,906,374,972.14
  5. Step 5: Solve for x
    x = 3,906,374,972.14/91,606
  6. Step 6: Final answer
    x = 42,643.22

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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.