Home / 81,020.32-111,807.78-45,209.92

Finding the Fourth Proportional to 81,020.32, 111,807.78 and 45,209.92

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Solution

The fourth proportional to 81,020.32, 111,807.78 and 45,209.92 is: 62,389.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,020.32 : 111,807.78 = 45,209.92 : x
  2. Step 2: Convert to fraction form
    81,020.32/111,807.78 = 45,209.92/x
  3. Step 3: Cross multiply
    81,020.32x = 111,807.78 × 45,209.92
  4. Step 4: Simplify right side
    81,020.32x = 5,054,820,789.18
  5. Step 5: Solve for x
    x = 5,054,820,789.18/81,020.32
  6. Step 6: Final answer
    x = 62,389.54

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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.