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Finding the Fourth Proportional to 59,436, 89,161.44 and 21,989.76

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Solution

The fourth proportional to 59,436, 89,161.44 and 21,989.76 is: 32,987.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,436 : 89,161.44 = 21,989.76 : x
  2. Step 2: Convert to fraction form
    59,436/89,161.44 = 21,989.76/x
  3. Step 3: Cross multiply
    59,436x = 89,161.44 × 21,989.76
  4. Step 4: Simplify right side
    59,436x = 1,960,638,666.85
  5. Step 5: Solve for x
    x = 1,960,638,666.85/59,436
  6. Step 6: Final answer
    x = 32,987.39

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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.