Home / 87,715.10-121,039.52-51,898.88

Finding the Fourth Proportional to 87,715.10, 121,039.52 and 51,898.88

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Solution

The fourth proportional to 87,715.10, 121,039.52 and 51,898.88 is: 71,616.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,715.10 : 121,039.52 = 51,898.88 : x
  2. Step 2: Convert to fraction form
    87,715.10/121,039.52 = 51,898.88/x
  3. Step 3: Cross multiply
    87,715.10x = 121,039.52 × 51,898.88
  4. Step 4: Simplify right side
    87,715.10x = 6,281,814,885.99
  5. Step 5: Solve for x
    x = 6,281,814,885.99/87,715.10
  6. Step 6: Final answer
    x = 71,616.12

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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.