Home / 121,331.62-181,831.32-76,989.52

Finding the Fourth Proportional to 121,331.62, 181,831.32 and 76,989.52

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Solution

The fourth proportional to 121,331.62, 181,831.32 and 76,989.52 is: 115,378.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,331.62 : 181,831.32 = 76,989.52 : x
  2. Step 2: Convert to fraction form
    121,331.62/181,831.32 = 76,989.52/x
  3. Step 3: Cross multiply
    121,331.62x = 181,831.32 × 76,989.52
  4. Step 4: Simplify right side
    121,331.62x = 13,999,106,047.77
  5. Step 5: Solve for x
    x = 13,999,106,047.77/121,331.62
  6. Step 6: Final answer
    x = 115,378.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.