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Finding the Fourth Proportional to 211,231.40, 316,861.67 and 61,472.93

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Solution

The fourth proportional to 211,231.40, 316,861.67 and 61,472.93 is: 92,213.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,231.40 : 316,861.67 = 61,472.93 : x
  2. Step 2: Convert to fraction form
    211,231.40/316,861.67 = 61,472.93/x
  3. Step 3: Cross multiply
    211,231.40x = 316,861.67 × 61,472.93
  4. Step 4: Simplify right side
    211,231.40x = 19,478,413,828.97
  5. Step 5: Solve for x
    x = 19,478,413,828.97/211,231.40
  6. Step 6: Final answer
    x = 92,213.63

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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.