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Finding the Fourth Proportional to 99,671.27, 149,486.51 and 28,574.86

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Solution

The fourth proportional to 99,671.27, 149,486.51 and 28,574.86 is: 42,856.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,671.27 : 149,486.51 = 28,574.86 : x
  2. Step 2: Convert to fraction form
    99,671.27/149,486.51 = 28,574.86/x
  3. Step 3: Cross multiply
    99,671.27x = 149,486.51 × 28,574.86
  4. Step 4: Simplify right side
    99,671.27x = 4,271,555,491.98
  5. Step 5: Solve for x
    x = 4,271,555,491.98/99,671.27
  6. Step 6: Final answer
    x = 42,856.44

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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.