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Finding the Fourth Proportional to 170,043.60, 255,065.40 and 139,976.40

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Solution

The fourth proportional to 170,043.60, 255,065.40 and 139,976.40 is: 209,964.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,043.60 : 255,065.40 = 139,976.40 : x
  2. Step 2: Convert to fraction form
    170,043.60/255,065.40 = 139,976.40/x
  3. Step 3: Cross multiply
    170,043.60x = 255,065.40 × 139,976.40
  4. Step 4: Simplify right side
    170,043.60x = 35,703,136,456.56
  5. Step 5: Solve for x
    x = 35,703,136,456.56/170,043.60
  6. Step 6: Final answer
    x = 209,964.60

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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.