Home / 87,795.75-121,119.53-51,478.66

Finding the Fourth Proportional to 87,795.75, 121,119.53 and 51,478.66

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Solution

The fourth proportional to 87,795.75, 121,119.53 and 51,478.66 is: 71,017.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,795.75 : 121,119.53 = 51,478.66 : x
  2. Step 2: Convert to fraction form
    87,795.75/121,119.53 = 51,478.66/x
  3. Step 3: Cross multiply
    87,795.75x = 121,119.53 × 51,478.66
  4. Step 4: Simplify right side
    87,795.75x = 6,235,070,544.04
  5. Step 5: Solve for x
    x = 6,235,070,544.04/87,795.75
  6. Step 6: Final answer
    x = 71,017.91

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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.