Home / 80,776.36-121,208.29-77,831.20

Finding the Fourth Proportional to 80,776.36, 121,208.29 and 77,831.20

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Solution

The fourth proportional to 80,776.36, 121,208.29 and 77,831.20 is: 116,788.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,776.36 : 121,208.29 = 77,831.20 : x
  2. Step 2: Convert to fraction form
    80,776.36/121,208.29 = 77,831.20/x
  3. Step 3: Cross multiply
    80,776.36x = 121,208.29 × 77,831.20
  4. Step 4: Simplify right side
    80,776.36x = 9,433,786,617.58
  5. Step 5: Solve for x
    x = 9,433,786,617.58/80,776.36
  6. Step 6: Final answer
    x = 116,788.95

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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.