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Finding the Fourth Proportional to 64,542.88, 89,047.02 and 40,327.42

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Solution

The fourth proportional to 64,542.88, 89,047.02 and 40,327.42 is: 55,638.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,542.88 : 89,047.02 = 40,327.42 : x
  2. Step 2: Convert to fraction form
    64,542.88/89,047.02 = 40,327.42/x
  3. Step 3: Cross multiply
    64,542.88x = 89,047.02 × 40,327.42
  4. Step 4: Simplify right side
    64,542.88x = 3,591,036,575.29
  5. Step 5: Solve for x
    x = 3,591,036,575.29/64,542.88
  6. Step 6: Final answer
    x = 55,638.00

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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.