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Finding the Fourth Proportional to 127,870.20, 191,891.70 and 71,710.20

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Solution

The fourth proportional to 127,870.20, 191,891.70 and 71,710.20 is: 107,613.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,870.20 : 191,891.70 = 71,710.20 : x
  2. Step 2: Convert to fraction form
    127,870.20/191,891.70 = 71,710.20/x
  3. Step 3: Cross multiply
    127,870.20x = 191,891.70 × 71,710.20
  4. Step 4: Simplify right side
    127,870.20x = 13,760,592,185.34
  5. Step 5: Solve for x
    x = 13,760,592,185.34/127,870.20
  6. Step 6: Final answer
    x = 107,613.75

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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.