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Finding the Fourth Proportional to 127,138.26, 175,484.84 and 79,362.84

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Solution

The fourth proportional to 127,138.26, 175,484.84 and 79,362.84 is: 109,541.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,138.26 : 175,484.84 = 79,362.84 : x
  2. Step 2: Convert to fraction form
    127,138.26/175,484.84 = 79,362.84/x
  3. Step 3: Cross multiply
    127,138.26x = 175,484.84 × 79,362.84
  4. Step 4: Simplify right side
    127,138.26x = 13,926,975,279.35
  5. Step 5: Solve for x
    x = 13,926,975,279.35/127,138.26
  6. Step 6: Final answer
    x = 109,541.97

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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.