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Finding the Fourth Proportional to 210,808.52, 316,166.98 and 66,725.54

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Solution

The fourth proportional to 210,808.52, 316,166.98 and 66,725.54 is: 100,073.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,808.52 : 316,166.98 = 66,725.54 : x
  2. Step 2: Convert to fraction form
    210,808.52/316,166.98 = 66,725.54/x
  3. Step 3: Cross multiply
    210,808.52x = 316,166.98 × 66,725.54
  4. Step 4: Simplify right side
    210,808.52x = 21,096,412,470.67
  5. Step 5: Solve for x
    x = 21,096,412,470.67/210,808.52
  6. Step 6: Final answer
    x = 100,073.81

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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.