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Finding the Fourth Proportional to 64,979.22, 89,674.11 and 38,142.30

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Solution

The fourth proportional to 64,979.22, 89,674.11 and 38,142.30 is: 52,638.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,979.22 : 89,674.11 = 38,142.30 : x
  2. Step 2: Convert to fraction form
    64,979.22/89,674.11 = 38,142.30/x
  3. Step 3: Cross multiply
    64,979.22x = 89,674.11 × 38,142.30
  4. Step 4: Simplify right side
    64,979.22x = 3,420,376,805.85
  5. Step 5: Solve for x
    x = 3,420,376,805.85/64,979.22
  6. Step 6: Final answer
    x = 52,638.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.