Home / 81,155.21-111,992.09-45,345.49

Finding the Fourth Proportional to 81,155.21, 111,992.09 and 45,345.49

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Solution

The fourth proportional to 81,155.21, 111,992.09 and 45,345.49 is: 62,575.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,155.21 : 111,992.09 = 45,345.49 : x
  2. Step 2: Convert to fraction form
    81,155.21/111,992.09 = 45,345.49/x
  3. Step 3: Cross multiply
    81,155.21x = 111,992.09 × 45,345.49
  4. Step 4: Simplify right side
    81,155.21x = 5,078,335,690.47
  5. Step 5: Solve for x
    x = 5,078,335,690.47/81,155.21
  6. Step 6: Final answer
    x = 62,575.60

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Find fourth proportional to 81,156.21, 111,993.46 and 45,346.49
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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.