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Finding the Fourth Proportional to 170,039.60, 255,059.40 and 139,972.40

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Solution

The fourth proportional to 170,039.60, 255,059.40 and 139,972.40 is: 209,958.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,039.60 : 255,059.40 = 139,972.40 : x
  2. Step 2: Convert to fraction form
    170,039.60/255,059.40 = 139,972.40/x
  3. Step 3: Cross multiply
    170,039.60x = 255,059.40 × 139,972.40
  4. Step 4: Simplify right side
    170,039.60x = 35,701,276,360.56
  5. Step 5: Solve for x
    x = 35,701,276,360.56/170,039.60
  6. Step 6: Final answer
    x = 209,958.60

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1.5x scale

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.