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Finding the Fourth Proportional to 68,458.92, 102,700.05 and 30,521.95

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Solution

The fourth proportional to 68,458.92, 102,700.05 and 30,521.95 is: 45,788.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,458.92 : 102,700.05 = 30,521.95 : x
  2. Step 2: Convert to fraction form
    68,458.92/102,700.05 = 30,521.95/x
  3. Step 3: Cross multiply
    68,458.92x = 102,700.05 × 30,521.95
  4. Step 4: Simplify right side
    68,458.92x = 3,134,606,124.15
  5. Step 5: Solve for x
    x = 3,134,606,124.15/68,458.92
  6. Step 6: Final answer
    x = 45,788.13

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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.