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Finding the Fourth Proportional to 211,039.69, 316,520.85 and 57,168.66

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Solution

The fourth proportional to 211,039.69, 316,520.85 and 57,168.66 is: 85,742.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,039.69 : 316,520.85 = 57,168.66 : x
  2. Step 2: Convert to fraction form
    211,039.69/316,520.85 = 57,168.66/x
  3. Step 3: Cross multiply
    211,039.69x = 316,520.85 × 57,168.66
  4. Step 4: Simplify right side
    211,039.69x = 18,095,072,856.56
  5. Step 5: Solve for x
    x = 18,095,072,856.56/211,039.69
  6. Step 6: Final answer
    x = 85,742.51

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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.