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Finding the Fourth Proportional to 68,411.40, 102,617.10 and 18,499.20

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Solution

The fourth proportional to 68,411.40, 102,617.10 and 18,499.20 is: 27,748.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,411.40 : 102,617.10 = 18,499.20 : x
  2. Step 2: Convert to fraction form
    68,411.40/102,617.10 = 18,499.20/x
  3. Step 3: Cross multiply
    68,411.40x = 102,617.10 × 18,499.20
  4. Step 4: Simplify right side
    68,411.40x = 1,898,334,256.32
  5. Step 5: Solve for x
    x = 1,898,334,256.32/68,411.40
  6. Step 6: Final answer
    x = 27,748.80

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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.