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Finding the Fourth Proportional to 171,920.40, 257,880.60 and 142,371.60

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Solution

The fourth proportional to 171,920.40, 257,880.60 and 142,371.60 is: 213,557.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,920.40 : 257,880.60 = 142,371.60 : x
  2. Step 2: Convert to fraction form
    171,920.40/257,880.60 = 142,371.60/x
  3. Step 3: Cross multiply
    171,920.40x = 257,880.60 × 142,371.60
  4. Step 4: Simplify right side
    171,920.40x = 36,714,873,630.96
  5. Step 5: Solve for x
    x = 36,714,873,630.96/171,920.40
  6. Step 6: Final answer
    x = 213,557.40

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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.