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Finding the Fourth Proportional to 89,980.91, 124,171.28 and 49,693.81

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Solution

The fourth proportional to 89,980.91, 124,171.28 and 49,693.81 is: 68,576.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,980.91 : 124,171.28 = 49,693.81 : x
  2. Step 2: Convert to fraction form
    89,980.91/124,171.28 = 49,693.81/x
  3. Step 3: Cross multiply
    89,980.91x = 124,171.28 × 49,693.81
  4. Step 4: Simplify right side
    89,980.91x = 6,170,543,904.15
  5. Step 5: Solve for x
    x = 6,170,543,904.15/89,980.91
  6. Step 6: Final answer
    x = 68,576.14

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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.