Home / 84,500.45-126,750.33-21,320.72

Finding the Fourth Proportional to 84,500.45, 126,750.33 and 21,320.72

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Solution

The fourth proportional to 84,500.45, 126,750.33 and 21,320.72 is: 31,980.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,500.45 : 126,750.33 = 21,320.72 : x
  2. Step 2: Convert to fraction form
    84,500.45/126,750.33 = 21,320.72/x
  3. Step 3: Cross multiply
    84,500.45x = 126,750.33 × 21,320.72
  4. Step 4: Simplify right side
    84,500.45x = 2,702,407,662.09
  5. Step 5: Solve for x
    x = 2,702,407,662.09/84,500.45
  6. Step 6: Final answer
    x = 31,980.99

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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.