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Finding the Fourth Proportional to 87,993.71, 121,430.58 and 49,760.77

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Solution

The fourth proportional to 87,993.71, 121,430.58 and 49,760.77 is: 68,669.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,993.71 : 121,430.58 = 49,760.77 : x
  2. Step 2: Convert to fraction form
    87,993.71/121,430.58 = 49,760.77/x
  3. Step 3: Cross multiply
    87,993.71x = 121,430.58 × 49,760.77
  4. Step 4: Simplify right side
    87,993.71x = 6,042,478,555.19
  5. Step 5: Solve for x
    x = 6,042,478,555.19/87,993.71
  6. Step 6: Final answer
    x = 68,669.44

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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.