Home / 87,509.58-131,307.21-54,220.78

Finding the Fourth Proportional to 87,509.58, 131,307.21 and 54,220.78

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Solution

The fourth proportional to 87,509.58, 131,307.21 and 54,220.78 is: 81,357.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,509.58 : 131,307.21 = 54,220.78 : x
  2. Step 2: Convert to fraction form
    87,509.58/131,307.21 = 54,220.78/x
  3. Step 3: Cross multiply
    87,509.58x = 131,307.21 × 54,220.78
  4. Step 4: Simplify right side
    87,509.58x = 7,119,579,345.82
  5. Step 5: Solve for x
    x = 7,119,579,345.82/87,509.58
  6. Step 6: Final answer
    x = 81,357.71

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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.