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Finding the Fourth Proportional to 71,868,145.20, 107,802,217.80 and 28,716,010.80

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Solution

The fourth proportional to 71,868,145.20, 107,802,217.80 and 28,716,010.80 is: 43,074,016.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,868,145.20 : 107,802,217.80 = 28,716,010.80 : x
  2. Step 2: Convert to fraction form
    71,868,145.20/107,802,217.80 = 28,716,010.80/x
  3. Step 3: Cross multiply
    71,868,145.20x = 107,802,217.80 × 28,716,010.80
  4. Step 4: Simplify right side
    71,868,145.20x = 3,095,649,650,608,752
  5. Step 5: Solve for x
    x = 3,095,649,650,608,752/71,868,145.20
  6. Step 6: Final answer
    x = 43,074,016.20

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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.