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Finding the Fourth Proportional to 115,315.80, 172,916.10 and 52,915.80

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Solution

The fourth proportional to 115,315.80, 172,916.10 and 52,915.80 is: 79,347.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,315.80 : 172,916.10 = 52,915.80 : x
  2. Step 2: Convert to fraction form
    115,315.80/172,916.10 = 52,915.80/x
  3. Step 3: Cross multiply
    115,315.80x = 172,916.10 × 52,915.80
  4. Step 4: Simplify right side
    115,315.80x = 9,149,993,764.38
  5. Step 5: Solve for x
    x = 9,149,993,764.38/115,315.80
  6. Step 6: Final answer
    x = 79,347.27

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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.