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Finding the Fourth Proportional to 257,163.15, 385,744.73 and 90,951.15

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Solution

The fourth proportional to 257,163.15, 385,744.73 and 90,951.15 is: 136,426.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,163.15 : 385,744.73 = 90,951.15 : x
  2. Step 2: Convert to fraction form
    257,163.15/385,744.73 = 90,951.15/x
  3. Step 3: Cross multiply
    257,163.15x = 385,744.73 × 90,951.15
  4. Step 4: Simplify right side
    257,163.15x = 35,083,926,345.18
  5. Step 5: Solve for x
    x = 35,083,926,345.18/257,163.15
  6. Step 6: Final answer
    x = 136,426.73

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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.