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Finding the Fourth Proportional to 87,993, 121,430.88 and 50,289.12

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Solution

The fourth proportional to 87,993, 121,430.88 and 50,289.12 is: 69,399.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,993 : 121,430.88 = 50,289.12 : x
  2. Step 2: Convert to fraction form
    87,993/121,430.88 = 50,289.12/x
  3. Step 3: Cross multiply
    87,993x = 121,430.88 × 50,289.12
  4. Step 4: Simplify right side
    87,993x = 6,106,652,096.03
  5. Step 5: Solve for x
    x = 6,106,652,096.03/87,993
  6. Step 6: Final answer
    x = 69,399.29

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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.