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Finding the Fourth Proportional to 127,729.70, 191,680.95 and 71,569.70

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Solution

The fourth proportional to 127,729.70, 191,680.95 and 71,569.70 is: 107,402.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,729.70 : 191,680.95 = 71,569.70 : x
  2. Step 2: Convert to fraction form
    127,729.70/191,680.95 = 71,569.70/x
  3. Step 3: Cross multiply
    127,729.70x = 191,680.95 × 71,569.70
  4. Step 4: Simplify right side
    127,729.70x = 13,718,548,087.22
  5. Step 5: Solve for x
    x = 13,718,548,087.22/127,729.70
  6. Step 6: Final answer
    x = 107,402.96

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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.