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Finding the Fourth Proportional to 66,508.13, 99,723.80 and 45,473.65

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Solution

The fourth proportional to 66,508.13, 99,723.80 and 45,473.65 is: 68,184.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,508.13 : 99,723.80 = 45,473.65 : x
  2. Step 2: Convert to fraction form
    66,508.13/99,723.80 = 45,473.65/x
  3. Step 3: Cross multiply
    66,508.13x = 99,723.80 × 45,473.65
  4. Step 4: Simplify right side
    66,508.13x = 4,534,804,451.88
  5. Step 5: Solve for x
    x = 4,534,804,451.88/66,508.13
  6. Step 6: Final answer
    x = 68,184.21

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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.