Home / 156,122.84-215,447.14-87,213.21

Finding the Fourth Proportional to 156,122.84, 215,447.14 and 87,213.21

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Solution

The fourth proportional to 156,122.84, 215,447.14 and 87,213.21 is: 120,352.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,122.84 : 215,447.14 = 87,213.21 : x
  2. Step 2: Convert to fraction form
    156,122.84/215,447.14 = 87,213.21/x
  3. Step 3: Cross multiply
    156,122.84x = 215,447.14 × 87,213.21
  4. Step 4: Simplify right side
    156,122.84x = 18,789,835,965.81
  5. Step 5: Solve for x
    x = 18,789,835,965.81/156,122.84
  6. Step 6: Final answer
    x = 120,352.89

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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.