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Finding the Fourth Proportional to 127,718.46, 191,607.48 and 38,971.80

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Solution

The fourth proportional to 127,718.46, 191,607.48 and 38,971.80 is: 58,466.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,718.46 : 191,607.48 = 38,971.80 : x
  2. Step 2: Convert to fraction form
    127,718.46/191,607.48 = 38,971.80/x
  3. Step 3: Cross multiply
    127,718.46x = 191,607.48 × 38,971.80
  4. Step 4: Simplify right side
    127,718.46x = 7,467,288,389.06
  5. Step 5: Solve for x
    x = 7,467,288,389.06/127,718.46
  6. Step 6: Final answer
    x = 58,466.79

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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.