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Finding the Fourth Proportional to 101,175.20, 151,762.80 and 81,492.20

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Solution

The fourth proportional to 101,175.20, 151,762.80 and 81,492.20 is: 122,238.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,175.20 : 151,762.80 = 81,492.20 : x
  2. Step 2: Convert to fraction form
    101,175.20/151,762.80 = 81,492.20/x
  3. Step 3: Cross multiply
    101,175.20x = 151,762.80 × 81,492.20
  4. Step 4: Simplify right side
    101,175.20x = 12,367,484,450.16
  5. Step 5: Solve for x
    x = 12,367,484,450.16/101,175.20
  6. Step 6: Final answer
    x = 122,238.30

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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.