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Finding the Fourth Proportional to 56,991.87, 85,490.10 and 21,449.61

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Solution

The fourth proportional to 56,991.87, 85,490.10 and 21,449.61 is: 32,175.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,991.87 : 85,490.10 = 21,449.61 : x
  2. Step 2: Convert to fraction form
    56,991.87/85,490.10 = 21,449.61/x
  3. Step 3: Cross multiply
    56,991.87x = 85,490.10 × 21,449.61
  4. Step 4: Simplify right side
    56,991.87x = 1,833,729,303.86
  5. Step 5: Solve for x
    x = 1,833,729,303.86/56,991.87
  6. Step 6: Final answer
    x = 32,175.28

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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.