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Finding the Fourth Proportional to 127,721.74, 176,255.96 and 74,037.92

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Solution

The fourth proportional to 127,721.74, 176,255.96 and 74,037.92 is: 102,172.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,721.74 : 176,255.96 = 74,037.92 : x
  2. Step 2: Convert to fraction form
    127,721.74/176,255.96 = 74,037.92/x
  3. Step 3: Cross multiply
    127,721.74x = 176,255.96 × 74,037.92
  4. Step 4: Simplify right side
    127,721.74x = 13,049,624,666.00
  5. Step 5: Solve for x
    x = 13,049,624,666.00/127,721.74
  6. Step 6: Final answer
    x = 102,172.31

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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.