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Finding the Fourth Proportional to 91,671.60, 136,880.25 and 82,122.27

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Solution

The fourth proportional to 91,671.60, 136,880.25 and 82,122.27 is: 122,621.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,671.60 : 136,880.25 = 82,122.27 : x
  2. Step 2: Convert to fraction form
    91,671.60/136,880.25 = 82,122.27/x
  3. Step 3: Cross multiply
    91,671.60x = 136,880.25 × 82,122.27
  4. Step 4: Simplify right side
    91,671.60x = 11,240,916,848.17
  5. Step 5: Solve for x
    x = 11,240,916,848.17/91,671.60
  6. Step 6: Final answer
    x = 122,621.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.