Home / 81,149.07-112,016.97-72,636.18

Finding the Fourth Proportional to 81,149.07, 112,016.97 and 72,636.18

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Solution

The fourth proportional to 81,149.07, 112,016.97 and 72,636.18 is: 100,265.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,149.07 : 112,016.97 = 72,636.18 : x
  2. Step 2: Convert to fraction form
    81,149.07/112,016.97 = 72,636.18/x
  3. Step 3: Cross multiply
    81,149.07x = 112,016.97 × 72,636.18
  4. Step 4: Simplify right side
    81,149.07x = 8,136,484,171.62
  5. Step 5: Solve for x
    x = 8,136,484,171.62/81,149.07
  6. Step 6: Final answer
    x = 100,265.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.