Home / 80,881.09-121,210.91-51,319.69

Finding the Fourth Proportional to 80,881.09, 121,210.91 and 51,319.69

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Solution

The fourth proportional to 80,881.09, 121,210.91 and 51,319.69 is: 76,909.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,881.09 : 121,210.91 = 51,319.69 : x
  2. Step 2: Convert to fraction form
    80,881.09/121,210.91 = 51,319.69/x
  3. Step 3: Cross multiply
    80,881.09x = 121,210.91 × 51,319.69
  4. Step 4: Simplify right side
    80,881.09x = 6,220,505,463.16
  5. Step 5: Solve for x
    x = 6,220,505,463.16/80,881.09
  6. Step 6: Final answer
    x = 76,909.27

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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.