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Finding the Fourth Proportional to 68,626.32, 102,938.40 and 21,878.88

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Solution

The fourth proportional to 68,626.32, 102,938.40 and 21,878.88 is: 32,817.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,626.32 : 102,938.40 = 21,878.88 : x
  2. Step 2: Convert to fraction form
    68,626.32/102,938.40 = 21,878.88/x
  3. Step 3: Cross multiply
    68,626.32x = 102,938.40 × 21,878.88
  4. Step 4: Simplify right side
    68,626.32x = 2,252,176,900.99
  5. Step 5: Solve for x
    x = 2,252,176,900.99/68,626.32
  6. Step 6: Final answer
    x = 32,817.98

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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.