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Finding the Fourth Proportional to 55,920.70, 83,905.35 and 28,218.70

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Solution

The fourth proportional to 55,920.70, 83,905.35 and 28,218.70 is: 42,340.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,920.70 : 83,905.35 = 28,218.70 : x
  2. Step 2: Convert to fraction form
    55,920.70/83,905.35 = 28,218.70/x
  3. Step 3: Cross multiply
    55,920.70x = 83,905.35 × 28,218.70
  4. Step 4: Simplify right side
    55,920.70x = 2,367,699,900.05
  5. Step 5: Solve for x
    x = 2,367,699,900.05/55,920.70
  6. Step 6: Final answer
    x = 42,340.31

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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.