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Finding the Fourth Proportional to 73,985.58, 110,994.96 and 21,399.15

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Solution

The fourth proportional to 73,985.58, 110,994.96 and 21,399.15 is: 32,103.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,985.58 : 110,994.96 = 21,399.15 : x
  2. Step 2: Convert to fraction form
    73,985.58/110,994.96 = 21,399.15/x
  3. Step 3: Cross multiply
    73,985.58x = 110,994.96 × 21,399.15
  4. Step 4: Simplify right side
    73,985.58x = 2,375,197,798.28
  5. Step 5: Solve for x
    x = 2,375,197,798.28/73,985.58
  6. Step 6: Final answer
    x = 32,103.52

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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.