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Finding the Fourth Proportional to 127,474.50, 191,215.80 and 38,728.78

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Solution

The fourth proportional to 127,474.50, 191,215.80 and 38,728.78 is: 58,094.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,474.50 : 191,215.80 = 38,728.78 : x
  2. Step 2: Convert to fraction form
    127,474.50/191,215.80 = 38,728.78/x
  3. Step 3: Cross multiply
    127,474.50x = 191,215.80 × 38,728.78
  4. Step 4: Simplify right side
    127,474.50x = 7,405,554,172.68
  5. Step 5: Solve for x
    x = 7,405,554,172.68/127,474.50
  6. Step 6: Final answer
    x = 58,094.40

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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.