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Finding the Fourth Proportional to 90,732, 136,135.22 and 40,104.26

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Solution

The fourth proportional to 90,732, 136,135.22 and 40,104.26 is: 60,172.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,732 : 136,135.22 = 40,104.26 : x
  2. Step 2: Convert to fraction form
    90,732/136,135.22 = 40,104.26/x
  3. Step 3: Cross multiply
    90,732x = 136,135.22 × 40,104.26
  4. Step 4: Simplify right side
    90,732x = 5,459,602,258.04
  5. Step 5: Solve for x
    x = 5,459,602,258.04/90,732
  6. Step 6: Final answer
    x = 60,172.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.