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Finding the Fourth Proportional to 210,979.01, 316,446.65 and 111,098.72

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Solution

The fourth proportional to 210,979.01, 316,446.65 and 111,098.72 is: 166,636.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,979.01 : 316,446.65 = 111,098.72 : x
  2. Step 2: Convert to fraction form
    210,979.01/316,446.65 = 111,098.72/x
  3. Step 3: Cross multiply
    210,979.01x = 316,446.65 × 111,098.72
  4. Step 4: Simplify right side
    210,979.01x = 35,156,818,415.53
  5. Step 5: Solve for x
    x = 35,156,818,415.53/210,979.01
  6. Step 6: Final answer
    x = 166,636.57

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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.