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Finding the Fourth Proportional to 127,631.79, 176,128.79 and 79,911.45

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Solution

The fourth proportional to 127,631.79, 176,128.79 and 79,911.45 is: 110,275.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,631.79 : 176,128.79 = 79,911.45 : x
  2. Step 2: Convert to fraction form
    127,631.79/176,128.79 = 79,911.45/x
  3. Step 3: Cross multiply
    127,631.79x = 176,128.79 × 79,911.45
  4. Step 4: Simplify right side
    127,631.79x = 14,074,706,596.09
  5. Step 5: Solve for x
    x = 14,074,706,596.09/127,631.79
  6. Step 6: Final answer
    x = 110,275.87

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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.