Home / 80,776.74-121,208.85-77,831.58

Finding the Fourth Proportional to 80,776.74, 121,208.85 and 77,831.58

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Solution

The fourth proportional to 80,776.74, 121,208.85 and 77,831.58 is: 116,789.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,776.74 : 121,208.85 = 77,831.58 : x
  2. Step 2: Convert to fraction form
    80,776.74/121,208.85 = 77,831.58/x
  3. Step 3: Cross multiply
    80,776.74x = 121,208.85 × 77,831.58
  4. Step 4: Simplify right side
    80,776.74x = 9,433,875,699.44
  5. Step 5: Solve for x
    x = 9,433,875,699.44/80,776.74
  6. Step 6: Final answer
    x = 116,789.51

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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.