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Finding the Fourth Proportional to 139,627.51, 207,861.95 and 138,797.13

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Solution

The fourth proportional to 139,627.51, 207,861.95 and 138,797.13 is: 206,625.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,627.51 : 207,861.95 = 138,797.13 : x
  2. Step 2: Convert to fraction form
    139,627.51/207,861.95 = 138,797.13/x
  3. Step 3: Cross multiply
    139,627.51x = 207,861.95 × 138,797.13
  4. Step 4: Simplify right side
    139,627.51x = 28,850,642,096.20
  5. Step 5: Solve for x
    x = 28,850,642,096.20/139,627.51
  6. Step 6: Final answer
    x = 206,625.77

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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.