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Finding the Fourth Proportional to 81,171.72, 112,019.16 and 45,365.64

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Solution

The fourth proportional to 81,171.72, 112,019.16 and 45,365.64 is: 62,605.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,171.72 : 112,019.16 = 45,365.64 : x
  2. Step 2: Convert to fraction form
    81,171.72/112,019.16 = 45,365.64/x
  3. Step 3: Cross multiply
    81,171.72x = 112,019.16 × 45,365.64
  4. Step 4: Simplify right side
    81,171.72x = 5,081,820,885.66
  5. Step 5: Solve for x
    x = 5,081,820,885.66/81,171.72
  6. Step 6: Final answer
    x = 62,605.81

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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.