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Finding the Fourth Proportional to 72,679.20, 109,018.80 and 56,932.80

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Solution

The fourth proportional to 72,679.20, 109,018.80 and 56,932.80 is: 85,399.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,679.20 : 109,018.80 = 56,932.80 : x
  2. Step 2: Convert to fraction form
    72,679.20/109,018.80 = 56,932.80/x
  3. Step 3: Cross multiply
    72,679.20x = 109,018.80 × 56,932.80
  4. Step 4: Simplify right side
    72,679.20x = 6,206,745,536.64
  5. Step 5: Solve for x
    x = 6,206,745,536.64/72,679.20
  6. Step 6: Final answer
    x = 85,399.20

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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.