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Finding the Fourth Proportional to 68,368.95, 102,508.90 and 28,376.91

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Solution

The fourth proportional to 68,368.95, 102,508.90 and 28,376.91 is: 42,546.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,368.95 : 102,508.90 = 28,376.91 : x
  2. Step 2: Convert to fraction form
    68,368.95/102,508.90 = 28,376.91/x
  3. Step 3: Cross multiply
    68,368.95x = 102,508.90 × 28,376.91
  4. Step 4: Simplify right side
    68,368.95x = 2,908,885,758.56
  5. Step 5: Solve for x
    x = 2,908,885,758.56/68,368.95
  6. Step 6: Final answer
    x = 42,546.88

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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.