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Finding the Fourth Proportional to 171,818.80, 257,728.20 and 72,091.60

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Solution

The fourth proportional to 171,818.80, 257,728.20 and 72,091.60 is: 108,137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,818.80 : 257,728.20 = 72,091.60 : x
  2. Step 2: Convert to fraction form
    171,818.80/257,728.20 = 72,091.60/x
  3. Step 3: Cross multiply
    171,818.80x = 257,728.20 × 72,091.60
  4. Step 4: Simplify right side
    171,818.80x = 18,580,038,303.12
  5. Step 5: Solve for x
    x = 18,580,038,303.12/171,818.80
  6. Step 6: Final answer
    x = 108,137.40

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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.