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Finding the Fourth Proportional to 139,879.68, 209,817.80 and 83,735.44

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Solution

The fourth proportional to 139,879.68, 209,817.80 and 83,735.44 is: 125,602.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,879.68 : 209,817.80 = 83,735.44 : x
  2. Step 2: Convert to fraction form
    139,879.68/209,817.80 = 83,735.44/x
  3. Step 3: Cross multiply
    139,879.68x = 209,817.80 × 83,735.44
  4. Step 4: Simplify right side
    139,879.68x = 17,569,185,802.83
  5. Step 5: Solve for x
    x = 17,569,185,802.83/139,879.68
  6. Step 6: Final answer
    x = 125,602.13

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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.