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Finding the Fourth Proportional to 100,968.80, 151,453.20 and 91,127.30

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Solution

The fourth proportional to 100,968.80, 151,453.20 and 91,127.30 is: 136,690.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,968.80 : 151,453.20 = 91,127.30 : x
  2. Step 2: Convert to fraction form
    100,968.80/151,453.20 = 91,127.30/x
  3. Step 3: Cross multiply
    100,968.80x = 151,453.20 × 91,127.30
  4. Step 4: Simplify right side
    100,968.80x = 13,801,521,192.36
  5. Step 5: Solve for x
    x = 13,801,521,192.36/100,968.80
  6. Step 6: Final answer
    x = 136,690.95

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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.