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Finding the Fourth Proportional to 45,856.67, 68,785.11 and 12,577.21

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Solution

The fourth proportional to 45,856.67, 68,785.11 and 12,577.21 is: 18,865.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,856.67 : 68,785.11 = 12,577.21 : x
  2. Step 2: Convert to fraction form
    45,856.67/68,785.11 = 12,577.21/x
  3. Step 3: Cross multiply
    45,856.67x = 68,785.11 × 12,577.21
  4. Step 4: Simplify right side
    45,856.67x = 865,124,710.46
  5. Step 5: Solve for x
    x = 865,124,710.46/45,856.67
  6. Step 6: Final answer
    x = 18,865.84

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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.