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Finding the Fourth Proportional to 139,624.51, 207,857.48 and 138,794.13

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Solution

The fourth proportional to 139,624.51, 207,857.48 and 138,794.13 is: 206,621.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,624.51 : 207,857.48 = 138,794.13 : x
  2. Step 2: Convert to fraction form
    139,624.51/207,857.48 = 138,794.13/x
  3. Step 3: Cross multiply
    139,624.51x = 207,857.48 × 138,794.13
  4. Step 4: Simplify right side
    139,624.51x = 28,849,398,100.59
  5. Step 5: Solve for x
    x = 28,849,398,100.59/139,624.51
  6. Step 6: Final answer
    x = 206,621.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.