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Finding the Fourth Proportional to 139,622.45, 207,854.51 and 138,792.08

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Solution

The fourth proportional to 139,622.45, 207,854.51 and 138,792.08 is: 206,618.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,622.45 : 207,854.51 = 138,792.08 : x
  2. Step 2: Convert to fraction form
    139,622.45/207,854.51 = 138,792.08/x
  3. Step 3: Cross multiply
    139,622.45x = 207,854.51 × 138,792.08
  4. Step 4: Simplify right side
    139,622.45x = 28,848,559,780.28
  5. Step 5: Solve for x
    x = 28,848,559,780.28/139,622.45
  6. Step 6: Final answer
    x = 206,618.35

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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.