Home / 87,990.23-121,427.37-47,703.89

Finding the Fourth Proportional to 87,990.23, 121,427.37 and 47,703.89

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Solution

The fourth proportional to 87,990.23, 121,427.37 and 47,703.89 is: 65,831.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,990.23 : 121,427.37 = 47,703.89 : x
  2. Step 2: Convert to fraction form
    87,990.23/121,427.37 = 47,703.89/x
  3. Step 3: Cross multiply
    87,990.23x = 121,427.37 × 47,703.89
  4. Step 4: Simplify right side
    87,990.23x = 5,792,557,901.47
  5. Step 5: Solve for x
    x = 5,792,557,901.47/87,990.23
  6. Step 6: Final answer
    x = 65,831.83

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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.