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Finding the Fourth Proportional to 81,052.74, 121,571.81 and 57,461.39

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Solution

The fourth proportional to 81,052.74, 121,571.81 and 57,461.39 is: 86,186.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,052.74 : 121,571.81 = 57,461.39 : x
  2. Step 2: Convert to fraction form
    81,052.74/121,571.81 = 57,461.39/x
  3. Step 3: Cross multiply
    81,052.74x = 121,571.81 × 57,461.39
  4. Step 4: Simplify right side
    81,052.74x = 6,985,685,187.42
  5. Step 5: Solve for x
    x = 6,985,685,187.42/81,052.74
  6. Step 6: Final answer
    x = 86,186.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.