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Finding the Fourth Proportional to 66,458.70, 99,720.45 and 50,658.30

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Solution

The fourth proportional to 66,458.70, 99,720.45 and 50,658.30 is: 76,012.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,458.70 : 99,720.45 = 50,658.30 : x
  2. Step 2: Convert to fraction form
    66,458.70/99,720.45 = 50,658.30/x
  3. Step 3: Cross multiply
    66,458.70x = 99,720.45 × 50,658.30
  4. Step 4: Simplify right side
    66,458.70x = 5,051,668,472.24
  5. Step 5: Solve for x
    x = 5,051,668,472.24/66,458.70
  6. Step 6: Final answer
    x = 76,012.15

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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.