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Finding the Fourth Proportional to 127,357.56, 175,754.50 and 79,638.58

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Solution

The fourth proportional to 127,357.56, 175,754.50 and 79,638.58 is: 109,901.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,357.56 : 175,754.50 = 79,638.58 : x
  2. Step 2: Convert to fraction form
    127,357.56/175,754.50 = 79,638.58/x
  3. Step 3: Cross multiply
    127,357.56x = 175,754.50 × 79,638.58
  4. Step 4: Simplify right side
    127,357.56x = 13,996,838,808.61
  5. Step 5: Solve for x
    x = 13,996,838,808.61/127,357.56
  6. Step 6: Final answer
    x = 109,901.91

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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.