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Finding the Fourth Proportional to 89,143.60, 133,672.20 and 49,658.80

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Solution

The fourth proportional to 89,143.60, 133,672.20 and 49,658.80 is: 74,464.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,143.60 : 133,672.20 = 49,658.80 : x
  2. Step 2: Convert to fraction form
    89,143.60/133,672.20 = 49,658.80/x
  3. Step 3: Cross multiply
    89,143.60x = 133,672.20 × 49,658.80
  4. Step 4: Simplify right side
    89,143.60x = 6,638,001,045.36
  5. Step 5: Solve for x
    x = 6,638,001,045.36/89,143.60
  6. Step 6: Final answer
    x = 74,464.13

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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.