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Finding the Fourth Proportional to 89,386.89, 134,136.81 and 49,969.86

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Solution

The fourth proportional to 89,386.89, 134,136.81 and 49,969.86 is: 74,986.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,386.89 : 134,136.81 = 49,969.86 : x
  2. Step 2: Convert to fraction form
    89,386.89/134,136.81 = 49,969.86/x
  3. Step 3: Cross multiply
    89,386.89x = 134,136.81 × 49,969.86
  4. Step 4: Simplify right side
    89,386.89x = 6,702,797,616.55
  5. Step 5: Solve for x
    x = 6,702,797,616.55/89,386.89
  6. Step 6: Final answer
    x = 74,986.36

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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.