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Finding the Fourth Proportional to 55,921.20, 83,906.10 and 28,219.20

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Solution

The fourth proportional to 55,921.20, 83,906.10 and 28,219.20 is: 42,341.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,921.20 : 83,906.10 = 28,219.20 : x
  2. Step 2: Convert to fraction form
    55,921.20/83,906.10 = 28,219.20/x
  3. Step 3: Cross multiply
    55,921.20x = 83,906.10 × 28,219.20
  4. Step 4: Simplify right side
    55,921.20x = 2,367,763,017.12
  5. Step 5: Solve for x
    x = 2,367,763,017.12/55,921.20
  6. Step 6: Final answer
    x = 42,341.06

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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.