Home / 81,220.55-121,812.60-53,336.30

Finding the Fourth Proportional to 81,220.55, 121,812.60 and 53,336.30

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Solution

The fourth proportional to 81,220.55, 121,812.60 and 53,336.30 is: 79,992.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,220.55 : 121,812.60 = 53,336.30 : x
  2. Step 2: Convert to fraction form
    81,220.55/121,812.60 = 53,336.30/x
  3. Step 3: Cross multiply
    81,220.55x = 121,812.60 × 53,336.30
  4. Step 4: Simplify right side
    81,220.55x = 6,497,033,377.38
  5. Step 5: Solve for x
    x = 6,497,033,377.38/81,220.55
  6. Step 6: Final answer
    x = 79,992.48

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1.5x scale

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.