Home / 87,638.32-120,965.66-51,840.78

Finding the Fourth Proportional to 87,638.32, 120,965.66 and 51,840.78

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Solution

The fourth proportional to 87,638.32, 120,965.66 and 51,840.78 is: 71,554.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,638.32 : 120,965.66 = 51,840.78 : x
  2. Step 2: Convert to fraction form
    87,638.32/120,965.66 = 51,840.78/x
  3. Step 3: Cross multiply
    87,638.32x = 120,965.66 × 51,840.78
  4. Step 4: Simplify right side
    87,638.32x = 6,270,953,649.19
  5. Step 5: Solve for x
    x = 6,270,953,649.19/87,638.32
  6. Step 6: Final answer
    x = 71,554.93

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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.