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Finding the Fourth Proportional to 55,920.20, 83,904.60 and 28,218.20

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Solution

The fourth proportional to 55,920.20, 83,904.60 and 28,218.20 is: 42,339.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,920.20 : 83,904.60 = 28,218.20 : x
  2. Step 2: Convert to fraction form
    55,920.20/83,904.60 = 28,218.20/x
  3. Step 3: Cross multiply
    55,920.20x = 83,904.60 × 28,218.20
  4. Step 4: Simplify right side
    55,920.20x = 2,367,636,783.72
  5. Step 5: Solve for x
    x = 2,367,636,783.72/55,920.20
  6. Step 6: Final answer
    x = 42,339.56

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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.