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Finding the Fourth Proportional to 68,167.40, 102,251.10 and 21,420.20

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Solution

The fourth proportional to 68,167.40, 102,251.10 and 21,420.20 is: 32,130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,167.40 : 102,251.10 = 21,420.20 : x
  2. Step 2: Convert to fraction form
    68,167.40/102,251.10 = 21,420.20/x
  3. Step 3: Cross multiply
    68,167.40x = 102,251.10 × 21,420.20
  4. Step 4: Simplify right side
    68,167.40x = 2,190,239,012.22
  5. Step 5: Solve for x
    x = 2,190,239,012.22/68,167.40
  6. Step 6: Final answer
    x = 32,130.30

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1.5x scale

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.