Home / 87,799.81-121,156.09-51,508.57

Finding the Fourth Proportional to 87,799.81, 121,156.09 and 51,508.57

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Solution

The fourth proportional to 87,799.81, 121,156.09 and 51,508.57 is: 71,077.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,799.81 : 121,156.09 = 51,508.57 : x
  2. Step 2: Convert to fraction form
    87,799.81/121,156.09 = 51,508.57/x
  3. Step 3: Cross multiply
    87,799.81x = 121,156.09 × 51,508.57
  4. Step 4: Simplify right side
    87,799.81x = 6,240,576,942.69
  5. Step 5: Solve for x
    x = 6,240,576,942.69/87,799.81
  6. Step 6: Final answer
    x = 71,077.34

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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.