Home / 80,923.36-121,440-28,332.64

Finding the Fourth Proportional to 80,923.36, 121,440 and 28,332.64

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Solution

The fourth proportional to 80,923.36, 121,440 and 28,332.64 is: 42,518.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,923.36 : 121,440 = 28,332.64 : x
  2. Step 2: Convert to fraction form
    80,923.36/121,440 = 28,332.64/x
  3. Step 3: Cross multiply
    80,923.36x = 121,440 × 28,332.64
  4. Step 4: Simplify right side
    80,923.36x = 3,440,715,801.60
  5. Step 5: Solve for x
    x = 3,440,715,801.60/80,923.36
  6. Step 6: Final answer
    x = 42,518.20

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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.