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Finding the Fourth Proportional to 127,891.81, 176,491.47 and 74,208.79

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Solution

The fourth proportional to 127,891.81, 176,491.47 and 74,208.79 is: 102,408.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,891.81 : 176,491.47 = 74,208.79 : x
  2. Step 2: Convert to fraction form
    127,891.81/176,491.47 = 74,208.79/x
  3. Step 3: Cross multiply
    127,891.81x = 176,491.47 × 74,208.79
  4. Step 4: Simplify right side
    127,891.81x = 13,097,218,434.02
  5. Step 5: Solve for x
    x = 13,097,218,434.02/127,891.81
  6. Step 6: Final answer
    x = 102,408.58

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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.