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Finding the Fourth Proportional to 64,641.88, 96,962.81 and 20,272.20

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Solution

The fourth proportional to 64,641.88, 96,962.81 and 20,272.20 is: 30,408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,641.88 : 96,962.81 = 20,272.20 : x
  2. Step 2: Convert to fraction form
    64,641.88/96,962.81 = 20,272.20/x
  3. Step 3: Cross multiply
    64,641.88x = 96,962.81 × 20,272.20
  4. Step 4: Simplify right side
    64,641.88x = 1,965,649,527.56
  5. Step 5: Solve for x
    x = 1,965,649,527.56/64,641.88
  6. Step 6: Final answer
    x = 30,408.30

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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.