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Finding the Fourth Proportional to 89,963.42, 124,148.91 and 49,679.72

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Solution

The fourth proportional to 89,963.42, 124,148.91 and 49,679.72 is: 68,557.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,963.42 : 124,148.91 = 49,679.72 : x
  2. Step 2: Convert to fraction form
    89,963.42/124,148.91 = 49,679.72/x
  3. Step 3: Cross multiply
    89,963.42x = 124,148.91 × 49,679.72
  4. Step 4: Simplify right side
    89,963.42x = 6,167,683,087.11
  5. Step 5: Solve for x
    x = 6,167,683,087.11/89,963.42
  6. Step 6: Final answer
    x = 68,557.68

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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.