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Finding the Fourth Proportional to 155,915.86, 215,163.87 and 84,295.87

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Solution

The fourth proportional to 155,915.86, 215,163.87 and 84,295.87 is: 116,328.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,915.86 : 215,163.87 = 84,295.87 : x
  2. Step 2: Convert to fraction form
    155,915.86/215,163.87 = 84,295.87/x
  3. Step 3: Cross multiply
    155,915.86x = 215,163.87 × 84,295.87
  4. Step 4: Simplify right side
    155,915.86x = 18,137,425,614.22
  5. Step 5: Solve for x
    x = 18,137,425,614.22/155,915.86
  6. Step 6: Final answer
    x = 116,328.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.