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Finding the Fourth Proportional to 66,965.40, 100,448.10 and 43,345.80

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Solution

The fourth proportional to 66,965.40, 100,448.10 and 43,345.80 is: 65,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,965.40 : 100,448.10 = 43,345.80 : x
  2. Step 2: Convert to fraction form
    66,965.40/100,448.10 = 43,345.80/x
  3. Step 3: Cross multiply
    66,965.40x = 100,448.10 × 43,345.80
  4. Step 4: Simplify right side
    66,965.40x = 4,354,003,252.98
  5. Step 5: Solve for x
    x = 4,354,003,252.98/66,965.40
  6. Step 6: Final answer
    x = 65,018.70

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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.