Home / 81,155.41-111,992.38-45,345.65

Finding the Fourth Proportional to 81,155.41, 111,992.38 and 45,345.65

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Solution

The fourth proportional to 81,155.41, 111,992.38 and 45,345.65 is: 62,575.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,155.41 : 111,992.38 = 45,345.65 : x
  2. Step 2: Convert to fraction form
    81,155.41/111,992.38 = 45,345.65/x
  3. Step 3: Cross multiply
    81,155.41x = 111,992.38 × 45,345.65
  4. Step 4: Simplify right side
    81,155.41x = 5,078,366,592.82
  5. Step 5: Solve for x
    x = 5,078,366,592.82/81,155.41
  6. Step 6: Final answer
    x = 62,575.83

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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.