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Finding the Fourth Proportional to 127,354.40, 175,749.92 and 79,635.68

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Solution

The fourth proportional to 127,354.40, 175,749.92 and 79,635.68 is: 109,897.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,354.40 : 175,749.92 = 79,635.68 : x
  2. Step 2: Convert to fraction form
    127,354.40/175,749.92 = 79,635.68/x
  3. Step 3: Cross multiply
    127,354.40x = 175,749.92 × 79,635.68
  4. Step 4: Simplify right side
    127,354.40x = 13,995,964,389.15
  5. Step 5: Solve for x
    x = 13,995,964,389.15/127,354.40
  6. Step 6: Final answer
    x = 109,897.77

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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.