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Finding the Fourth Proportional to 64,077.98, 96,119.64 and 21,987

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Solution

The fourth proportional to 64,077.98, 96,119.64 and 21,987 is: 32,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,077.98 : 96,119.64 = 21,987 : x
  2. Step 2: Convert to fraction form
    64,077.98/96,119.64 = 21,987/x
  3. Step 3: Cross multiply
    64,077.98x = 96,119.64 × 21,987
  4. Step 4: Simplify right side
    64,077.98x = 2,113,382,524.68
  5. Step 5: Solve for x
    x = 2,113,382,524.68/64,077.98
  6. Step 6: Final answer
    x = 32,981.42

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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.