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Finding the Fourth Proportional to 89,969.78, 124,157.66 and 49,683.22

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Solution

The fourth proportional to 89,969.78, 124,157.66 and 49,683.22 is: 68,562.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,969.78 : 124,157.66 = 49,683.22 : x
  2. Step 2: Convert to fraction form
    89,969.78/124,157.66 = 49,683.22/x
  3. Step 3: Cross multiply
    89,969.78x = 124,157.66 × 49,683.22
  4. Step 4: Simplify right side
    89,969.78x = 6,168,552,336.47
  5. Step 5: Solve for x
    x = 6,168,552,336.47/89,969.78
  6. Step 6: Final answer
    x = 68,562.49

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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.