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Finding the Fourth Proportional to 207,530.56, 286,392.48 and 122,689.60

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Solution

The fourth proportional to 207,530.56, 286,392.48 and 122,689.60 is: 169,311.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,530.56 : 286,392.48 = 122,689.60 : x
  2. Step 2: Convert to fraction form
    207,530.56/286,392.48 = 122,689.60/x
  3. Step 3: Cross multiply
    207,530.56x = 286,392.48 × 122,689.60
  4. Step 4: Simplify right side
    207,530.56x = 35,137,378,814.21
  5. Step 5: Solve for x
    x = 35,137,378,814.21/207,530.56
  6. Step 6: Final answer
    x = 169,311.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.