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Finding the Fourth Proportional to 56,998.72, 85,488.09 and 15,436

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Solution

The fourth proportional to 56,998.72, 85,488.09 and 15,436 is: 23,151.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,998.72 : 85,488.09 = 15,436 : x
  2. Step 2: Convert to fraction form
    56,998.72/85,488.09 = 15,436/x
  3. Step 3: Cross multiply
    56,998.72x = 85,488.09 × 15,436
  4. Step 4: Simplify right side
    56,998.72x = 1,319,594,157.24
  5. Step 5: Solve for x
    x = 1,319,594,157.24/56,998.72
  6. Step 6: Final answer
    x = 23,151.29

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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.