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Finding the Fourth Proportional to 87,606.84, 120,855.16 and 57,378.86

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Solution

The fourth proportional to 87,606.84, 120,855.16 and 57,378.86 is: 79,155.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,606.84 : 120,855.16 = 57,378.86 : x
  2. Step 2: Convert to fraction form
    87,606.84/120,855.16 = 57,378.86/x
  3. Step 3: Cross multiply
    87,606.84x = 120,855.16 × 57,378.86
  4. Step 4: Simplify right side
    87,606.84x = 6,934,531,305.92
  5. Step 5: Solve for x
    x = 6,934,531,305.92/87,606.84
  6. Step 6: Final answer
    x = 79,155.14

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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.