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Finding the Fourth Proportional to 91,605.68, 137,428.27 and 28,424.47

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Solution

The fourth proportional to 91,605.68, 137,428.27 and 28,424.47 is: 42,642.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,605.68 : 137,428.27 = 28,424.47 : x
  2. Step 2: Convert to fraction form
    91,605.68/137,428.27 = 28,424.47/x
  3. Step 3: Cross multiply
    91,605.68x = 137,428.27 × 28,424.47
  4. Step 4: Simplify right side
    91,605.68x = 3,906,325,323.14
  5. Step 5: Solve for x
    x = 3,906,325,323.14/91,605.68
  6. Step 6: Final answer
    x = 42,642.83

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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.