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Finding the Fourth Proportional to 68,440.80, 102,664.88 and 21,697.32

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Solution

The fourth proportional to 68,440.80, 102,664.88 and 21,697.32 is: 32,547.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,440.80 : 102,664.88 = 21,697.32 : x
  2. Step 2: Convert to fraction form
    68,440.80/102,664.88 = 21,697.32/x
  3. Step 3: Cross multiply
    68,440.80x = 102,664.88 × 21,697.32
  4. Step 4: Simplify right side
    68,440.80x = 2,227,552,754.12
  5. Step 5: Solve for x
    x = 2,227,552,754.12/68,440.80
  6. Step 6: Final answer
    x = 32,547.15

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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.