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Finding the Fourth Proportional to 109,409.80, 164,136.30 and 92,000.20

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Solution

The fourth proportional to 109,409.80, 164,136.30 and 92,000.20 is: 138,018.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,409.80 : 164,136.30 = 92,000.20 : x
  2. Step 2: Convert to fraction form
    109,409.80/164,136.30 = 92,000.20/x
  3. Step 3: Cross multiply
    109,409.80x = 164,136.30 × 92,000.20
  4. Step 4: Simplify right side
    109,409.80x = 15,100,572,427.26
  5. Step 5: Solve for x
    x = 15,100,572,427.26/109,409.80
  6. Step 6: Final answer
    x = 138,018.46

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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.