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Finding the Fourth Proportional to 56,296.60, 84,420.60 and 28,205.80

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Solution

The fourth proportional to 56,296.60, 84,420.60 and 28,205.80 is: 42,296.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,296.60 : 84,420.60 = 28,205.80 : x
  2. Step 2: Convert to fraction form
    56,296.60/84,420.60 = 28,205.80/x
  3. Step 3: Cross multiply
    56,296.60x = 84,420.60 × 28,205.80
  4. Step 4: Simplify right side
    56,296.60x = 2,381,150,559.48
  5. Step 5: Solve for x
    x = 2,381,150,559.48/56,296.60
  6. Step 6: Final answer
    x = 42,296.53

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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.