Home / 81,186.92-121,583.56-56,156.72

Finding the Fourth Proportional to 81,186.92, 121,583.56 and 56,156.72

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Solution

The fourth proportional to 81,186.92, 121,583.56 and 56,156.72 is: 84,098.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,186.92 : 121,583.56 = 56,156.72 : x
  2. Step 2: Convert to fraction form
    81,186.92/121,583.56 = 56,156.72/x
  3. Step 3: Cross multiply
    81,186.92x = 121,583.56 × 56,156.72
  4. Step 4: Simplify right side
    81,186.92x = 6,827,733,935.52
  5. Step 5: Solve for x
    x = 6,827,733,935.52/81,186.92
  6. Step 6: Final answer
    x = 84,098.94

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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.