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Finding the Fourth Proportional to 91,056.40, 136,519.80 and 34,874.80

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Solution

The fourth proportional to 91,056.40, 136,519.80 and 34,874.80 is: 52,287.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,056.40 : 136,519.80 = 34,874.80 : x
  2. Step 2: Convert to fraction form
    91,056.40/136,519.80 = 34,874.80/x
  3. Step 3: Cross multiply
    91,056.40x = 136,519.80 × 34,874.80
  4. Step 4: Simplify right side
    91,056.40x = 4,761,100,721.04
  5. Step 5: Solve for x
    x = 4,761,100,721.04/91,056.40
  6. Step 6: Final answer
    x = 52,287.38

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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.