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Finding the Fourth Proportional to 211,366.47, 316,957.55 and 79,946.31

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Solution

The fourth proportional to 211,366.47, 316,957.55 and 79,946.31 is: 119,884.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,366.47 : 316,957.55 = 79,946.31 : x
  2. Step 2: Convert to fraction form
    211,366.47/316,957.55 = 79,946.31/x
  3. Step 3: Cross multiply
    211,366.47x = 316,957.55 × 79,946.31
  4. Step 4: Simplify right side
    211,366.47x = 25,339,586,549.14
  5. Step 5: Solve for x
    x = 25,339,586,549.14/211,366.47
  6. Step 6: Final answer
    x = 119,884.61

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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.