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Finding the Fourth Proportional to 171,745.20, 257,617.80 and 45,385.20

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Solution

The fourth proportional to 171,745.20, 257,617.80 and 45,385.20 is: 68,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,745.20 : 257,617.80 = 45,385.20 : x
  2. Step 2: Convert to fraction form
    171,745.20/257,617.80 = 45,385.20/x
  3. Step 3: Cross multiply
    171,745.20x = 257,617.80 × 45,385.20
  4. Step 4: Simplify right side
    171,745.20x = 11,692,035,376.56
  5. Step 5: Solve for x
    x = 11,692,035,376.56/171,745.20
  6. Step 6: Final answer
    x = 68,077.80

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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.