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Finding the Fourth Proportional to 52,718.40, 79,106.40 and 21,556.80

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Solution

The fourth proportional to 52,718.40, 79,106.40 and 21,556.80 is: 32,346.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,718.40 : 79,106.40 = 21,556.80 : x
  2. Step 2: Convert to fraction form
    52,718.40/79,106.40 = 21,556.80/x
  3. Step 3: Cross multiply
    52,718.40x = 79,106.40 × 21,556.80
  4. Step 4: Simplify right side
    52,718.40x = 1,705,280,843.52
  5. Step 5: Solve for x
    x = 1,705,280,843.52/52,718.40
  6. Step 6: Final answer
    x = 32,346.98

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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.