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Finding the Fourth Proportional to 56,611.80, 84,863.70 and 21,063.60

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Solution

The fourth proportional to 56,611.80, 84,863.70 and 21,063.60 is: 31,575.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,611.80 : 84,863.70 = 21,063.60 : x
  2. Step 2: Convert to fraction form
    56,611.80/84,863.70 = 21,063.60/x
  3. Step 3: Cross multiply
    56,611.80x = 84,863.70 × 21,063.60
  4. Step 4: Simplify right side
    56,611.80x = 1,787,535,031.32
  5. Step 5: Solve for x
    x = 1,787,535,031.32/56,611.80
  6. Step 6: Final answer
    x = 31,575.31

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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.