Home / 127,428.78-191,138.30-38,678.70

Finding the Fourth Proportional to 127,428.78, 191,138.30 and 38,678.70

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Solution

The fourth proportional to 127,428.78, 191,138.30 and 38,678.70 is: 58,016.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,428.78 : 191,138.30 = 38,678.70 : x
  2. Step 2: Convert to fraction form
    127,428.78/191,138.30 = 38,678.70/x
  3. Step 3: Cross multiply
    127,428.78x = 191,138.30 × 38,678.70
  4. Step 4: Simplify right side
    127,428.78x = 7,392,980,964.21
  5. Step 5: Solve for x
    x = 7,392,980,964.21/127,428.78
  6. Step 6: Final answer
    x = 58,016.57

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1.5x scale

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.