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Finding the Fourth Proportional to 52,810.55, 79,211.97 and 19,515.09

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Solution

The fourth proportional to 52,810.55, 79,211.97 and 19,515.09 is: 29,271.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,810.55 : 79,211.97 = 19,515.09 : x
  2. Step 2: Convert to fraction form
    52,810.55/79,211.97 = 19,515.09/x
  3. Step 3: Cross multiply
    52,810.55x = 79,211.97 × 19,515.09
  4. Step 4: Simplify right side
    52,810.55x = 1,545,828,723.63
  5. Step 5: Solve for x
    x = 1,545,828,723.63/52,810.55
  6. Step 6: Final answer
    x = 29,271.21

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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.