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Finding the Fourth Proportional to 68,595.66, 102,903.12 and 21,214.62

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Solution

The fourth proportional to 68,595.66, 102,903.12 and 21,214.62 is: 31,824.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,595.66 : 102,903.12 = 21,214.62 : x
  2. Step 2: Convert to fraction form
    68,595.66/102,903.12 = 21,214.62/x
  3. Step 3: Cross multiply
    68,595.66x = 102,903.12 × 21,214.62
  4. Step 4: Simplify right side
    68,595.66x = 2,183,050,587.61
  5. Step 5: Solve for x
    x = 2,183,050,587.61/68,595.66
  6. Step 6: Final answer
    x = 31,824.91

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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.