Home / 127,429.78-191,139.80-38,679.70

Finding the Fourth Proportional to 127,429.78, 191,139.80 and 38,679.70

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Solution

The fourth proportional to 127,429.78, 191,139.80 and 38,679.70 is: 58,018.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,429.78 : 191,139.80 = 38,679.70 : x
  2. Step 2: Convert to fraction form
    127,429.78/191,139.80 = 38,679.70/x
  3. Step 3: Cross multiply
    127,429.78x = 191,139.80 × 38,679.70
  4. Step 4: Simplify right side
    127,429.78x = 7,393,230,122.06
  5. Step 5: Solve for x
    x = 7,393,230,122.06/127,429.78
  6. Step 6: Final answer
    x = 58,018.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.