Home / 87,663.72-120,986.52-49,430.64

Finding the Fourth Proportional to 87,663.72, 120,986.52 and 49,430.64

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Solution

The fourth proportional to 87,663.72, 120,986.52 and 49,430.64 is: 68,220.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,663.72 : 120,986.52 = 49,430.64 : x
  2. Step 2: Convert to fraction form
    87,663.72/120,986.52 = 49,430.64/x
  3. Step 3: Cross multiply
    87,663.72x = 120,986.52 × 49,430.64
  4. Step 4: Simplify right side
    87,663.72x = 5,980,441,114.97
  5. Step 5: Solve for x
    x = 5,980,441,114.97/87,663.72
  6. Step 6: Final answer
    x = 68,220.25

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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.