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Finding the Fourth Proportional to 43,711.80, 65,600.10 and 28,915.80

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Solution

The fourth proportional to 43,711.80, 65,600.10 and 28,915.80 is: 43,395.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,711.80 : 65,600.10 = 28,915.80 : x
  2. Step 2: Convert to fraction form
    43,711.80/65,600.10 = 28,915.80/x
  3. Step 3: Cross multiply
    43,711.80x = 65,600.10 × 28,915.80
  4. Step 4: Simplify right side
    43,711.80x = 1,896,879,371.58
  5. Step 5: Solve for x
    x = 1,896,879,371.58/43,711.80
  6. Step 6: Final answer
    x = 43,395.13

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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.