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Finding the Fourth Proportional to 171,436.80, 257,155.20 and 53,107.20

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Solution

The fourth proportional to 171,436.80, 257,155.20 and 53,107.20 is: 79,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,436.80 : 257,155.20 = 53,107.20 : x
  2. Step 2: Convert to fraction form
    171,436.80/257,155.20 = 53,107.20/x
  3. Step 3: Cross multiply
    171,436.80x = 257,155.20 × 53,107.20
  4. Step 4: Simplify right side
    171,436.80x = 13,656,792,637.44
  5. Step 5: Solve for x
    x = 13,656,792,637.44/171,436.80
  6. Step 6: Final answer
    x = 79,660.80

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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.