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Finding the Fourth Proportional to 87,168.37, 120,155.87 and 56,938.56

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Solution

The fourth proportional to 87,168.37, 120,155.87 and 56,938.56 is: 78,486.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,168.37 : 120,155.87 = 56,938.56 : x
  2. Step 2: Convert to fraction form
    87,168.37/120,155.87 = 56,938.56/x
  3. Step 3: Cross multiply
    87,168.37x = 120,155.87 × 56,938.56
  4. Step 4: Simplify right side
    87,168.37x = 6,841,502,580.99
  5. Step 5: Solve for x
    x = 6,841,502,580.99/87,168.37
  6. Step 6: Final answer
    x = 78,486.07

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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.