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Finding the Fourth Proportional to 87,297.60, 120,432.60 and 55,012.68

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Solution

The fourth proportional to 87,297.60, 120,432.60 and 55,012.68 is: 75,893.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,297.60 : 120,432.60 = 55,012.68 : x
  2. Step 2: Convert to fraction form
    87,297.60/120,432.60 = 55,012.68/x
  3. Step 3: Cross multiply
    87,297.60x = 120,432.60 × 55,012.68
  4. Step 4: Simplify right side
    87,297.60x = 6,625,320,085.37
  5. Step 5: Solve for x
    x = 6,625,320,085.37/87,297.60
  6. Step 6: Final answer
    x = 75,893.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.