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Finding the Fourth Proportional to 243,066.65, 364,636.44 and 85,267.31

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Solution

The fourth proportional to 243,066.65, 364,636.44 and 85,267.31 is: 127,913.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,066.65 : 364,636.44 = 85,267.31 : x
  2. Step 2: Convert to fraction form
    243,066.65/364,636.44 = 85,267.31/x
  3. Step 3: Cross multiply
    243,066.65x = 364,636.44 × 85,267.31
  4. Step 4: Simplify right side
    243,066.65x = 31,091,568,366.78
  5. Step 5: Solve for x
    x = 31,091,568,366.78/243,066.65
  6. Step 6: Final answer
    x = 127,913.76

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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.