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Finding the Fourth Proportional to 68,497.40, 102,744.66 and 31,561.40

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Solution

The fourth proportional to 68,497.40, 102,744.66 and 31,561.40 is: 47,341.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,497.40 : 102,744.66 = 31,561.40 : x
  2. Step 2: Convert to fraction form
    68,497.40/102,744.66 = 31,561.40/x
  3. Step 3: Cross multiply
    68,497.40x = 102,744.66 × 31,561.40
  4. Step 4: Simplify right side
    68,497.40x = 3,242,765,312.12
  5. Step 5: Solve for x
    x = 3,242,765,312.12/68,497.40
  6. Step 6: Final answer
    x = 47,341.44

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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.