Home / 87,239.67-120,390.78-48,999.28

Finding the Fourth Proportional to 87,239.67, 120,390.78 and 48,999.28

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Solution

The fourth proportional to 87,239.67, 120,390.78 and 48,999.28 is: 67,619.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,239.67 : 120,390.78 = 48,999.28 : x
  2. Step 2: Convert to fraction form
    87,239.67/120,390.78 = 48,999.28/x
  3. Step 3: Cross multiply
    87,239.67x = 120,390.78 × 48,999.28
  4. Step 4: Simplify right side
    87,239.67x = 5,899,061,293.64
  5. Step 5: Solve for x
    x = 5,899,061,293.64/87,239.67
  6. Step 6: Final answer
    x = 67,619.02

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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.