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Finding the Fourth Proportional to 139,258.78, 208,957.19 and 55,079.33

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Solution

The fourth proportional to 139,258.78, 208,957.19 and 55,079.33 is: 82,646.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,258.78 : 208,957.19 = 55,079.33 : x
  2. Step 2: Convert to fraction form
    139,258.78/208,957.19 = 55,079.33/x
  3. Step 3: Cross multiply
    139,258.78x = 208,957.19 × 55,079.33
  4. Step 4: Simplify right side
    139,258.78x = 11,509,220,703.70
  5. Step 5: Solve for x
    x = 11,509,220,703.70/139,258.78
  6. Step 6: Final answer
    x = 82,646.29

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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.