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Finding the Fourth Proportional to 87,392.72, 120,651.72 and 57,671.12

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Solution

The fourth proportional to 87,392.72, 120,651.72 and 57,671.12 is: 79,618.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,392.72 : 120,651.72 = 57,671.12 : x
  2. Step 2: Convert to fraction form
    87,392.72/120,651.72 = 57,671.12/x
  3. Step 3: Cross multiply
    87,392.72x = 120,651.72 × 57,671.12
  4. Step 4: Simplify right side
    87,392.72x = 6,958,119,822.33
  5. Step 5: Solve for x
    x = 6,958,119,822.33/87,392.72
  6. Step 6: Final answer
    x = 79,618.99

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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.