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Finding the Fourth Proportional to 90,483.92, 135,710.76 and 28,149.56

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Solution

The fourth proportional to 90,483.92, 135,710.76 and 28,149.56 is: 42,219.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,483.92 : 135,710.76 = 28,149.56 : x
  2. Step 2: Convert to fraction form
    90,483.92/135,710.76 = 28,149.56/x
  3. Step 3: Cross multiply
    90,483.92x = 135,710.76 × 28,149.56
  4. Step 4: Simplify right side
    90,483.92x = 3,820,198,181.27
  5. Step 5: Solve for x
    x = 3,820,198,181.27/90,483.92
  6. Step 6: Final answer
    x = 42,219.64

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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.