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Finding the Fourth Proportional to 84,019.66, 115,869.22 and 61,322.72

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Solution

The fourth proportional to 84,019.66, 115,869.22 and 61,322.72 is: 84,568.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,019.66 : 115,869.22 = 61,322.72 : x
  2. Step 2: Convert to fraction form
    84,019.66/115,869.22 = 61,322.72/x
  3. Step 3: Cross multiply
    84,019.66x = 115,869.22 × 61,322.72
  4. Step 4: Simplify right side
    84,019.66x = 7,105,415,734.68
  5. Step 5: Solve for x
    x = 7,105,415,734.68/84,019.66
  6. Step 6: Final answer
    x = 84,568.49

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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.