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Finding the Fourth Proportional to 56,202.60, 84,279.60 and 28,111.80

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Solution

The fourth proportional to 56,202.60, 84,279.60 and 28,111.80 is: 42,155.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,202.60 : 84,279.60 = 28,111.80 : x
  2. Step 2: Convert to fraction form
    56,202.60/84,279.60 = 28,111.80/x
  3. Step 3: Cross multiply
    56,202.60x = 84,279.60 × 28,111.80
  4. Step 4: Simplify right side
    56,202.60x = 2,369,251,259.28
  5. Step 5: Solve for x
    x = 2,369,251,259.28/56,202.60
  6. Step 6: Final answer
    x = 42,155.55

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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.