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Finding the Fourth Proportional to 89,129.80, 133,730.70 and 39,219.40

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Solution

The fourth proportional to 89,129.80, 133,730.70 and 39,219.40 is: 58,844.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,129.80 : 133,730.70 = 39,219.40 : x
  2. Step 2: Convert to fraction form
    89,129.80/133,730.70 = 39,219.40/x
  3. Step 3: Cross multiply
    89,129.80x = 133,730.70 × 39,219.40
  4. Step 4: Simplify right side
    89,129.80x = 5,244,837,815.58
  5. Step 5: Solve for x
    x = 5,244,837,815.58/89,129.80
  6. Step 6: Final answer
    x = 58,844.94

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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.