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Finding the Fourth Proportional to 89,173.80, 122,980.14 and 58,989.96

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Solution

The fourth proportional to 89,173.80, 122,980.14 and 58,989.96 is: 81,353.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,173.80 : 122,980.14 = 58,989.96 : x
  2. Step 2: Convert to fraction form
    89,173.80/122,980.14 = 58,989.96/x
  3. Step 3: Cross multiply
    89,173.80x = 122,980.14 × 58,989.96
  4. Step 4: Simplify right side
    89,173.80x = 7,254,593,539.39
  5. Step 5: Solve for x
    x = 7,254,593,539.39/89,173.80
  6. Step 6: Final answer
    x = 81,353.42

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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.