Home / 87,219.18-120,322.26-51,384.78

Finding the Fourth Proportional to 87,219.18, 120,322.26 and 51,384.78

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Solution

The fourth proportional to 87,219.18, 120,322.26 and 51,384.78 is: 70,887.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,219.18 : 120,322.26 = 51,384.78 : x
  2. Step 2: Convert to fraction form
    87,219.18/120,322.26 = 51,384.78/x
  3. Step 3: Cross multiply
    87,219.18x = 120,322.26 × 51,384.78
  4. Step 4: Simplify right side
    87,219.18x = 6,182,732,859.20
  5. Step 5: Solve for x
    x = 6,182,732,859.20/87,219.18
  6. Step 6: Final answer
    x = 70,887.31

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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.