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Finding the Fourth Proportional to 88,138, 121,630.44 and 48,394

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Solution

The fourth proportional to 88,138, 121,630.44 and 48,394 is: 66,783.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,138 : 121,630.44 = 48,394 : x
  2. Step 2: Convert to fraction form
    88,138/121,630.44 = 48,394/x
  3. Step 3: Cross multiply
    88,138x = 121,630.44 × 48,394
  4. Step 4: Simplify right side
    88,138x = 5,886,183,513.36
  5. Step 5: Solve for x
    x = 5,886,183,513.36/88,138
  6. Step 6: Final answer
    x = 66,783.72

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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.