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Finding the Fourth Proportional to 87,993.71, 121,430.58 and 49,760.76

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Solution

The fourth proportional to 87,993.71, 121,430.58 and 49,760.76 is: 68,669.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,993.71 : 121,430.58 = 49,760.76 : x
  2. Step 2: Convert to fraction form
    87,993.71/121,430.58 = 49,760.76/x
  3. Step 3: Cross multiply
    87,993.71x = 121,430.58 × 49,760.76
  4. Step 4: Simplify right side
    87,993.71x = 6,042,477,948.04
  5. Step 5: Solve for x
    x = 6,042,477,948.04/87,993.71
  6. Step 6: Final answer
    x = 68,669.43

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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.