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Finding the Fourth Proportional to 127,892.78, 176,491.67 and 74,209.22

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Solution

The fourth proportional to 127,892.78, 176,491.67 and 74,209.22 is: 102,408.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,892.78 : 176,491.67 = 74,209.22 : x
  2. Step 2: Convert to fraction form
    127,892.78/176,491.67 = 74,209.22/x
  3. Step 3: Cross multiply
    127,892.78x = 176,491.67 × 74,209.22
  4. Step 4: Simplify right side
    127,892.78x = 13,097,307,913.69
  5. Step 5: Solve for x
    x = 13,097,307,913.69/127,892.78
  6. Step 6: Final answer
    x = 102,408.51

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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.