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Finding the Fourth Proportional to 210,872.02, 316,308.24 and 86,213.02

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Solution

The fourth proportional to 210,872.02, 316,308.24 and 86,213.02 is: 129,319.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,872.02 : 316,308.24 = 86,213.02 : x
  2. Step 2: Convert to fraction form
    210,872.02/316,308.24 = 86,213.02/x
  3. Step 3: Cross multiply
    210,872.02x = 316,308.24 × 86,213.02
  4. Step 4: Simplify right side
    210,872.02x = 27,269,888,621.28
  5. Step 5: Solve for x
    x = 27,269,888,621.28/210,872.02
  6. Step 6: Final answer
    x = 129,319.62

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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.