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Finding the Fourth Proportional to 210,851.88, 316,278.11 and 86,192.88

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Solution

The fourth proportional to 210,851.88, 316,278.11 and 86,192.88 is: 129,289.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,851.88 : 316,278.11 = 86,192.88 : x
  2. Step 2: Convert to fraction form
    210,851.88/316,278.11 = 86,192.88/x
  3. Step 3: Cross multiply
    210,851.88x = 316,278.11 × 86,192.88
  4. Step 4: Simplify right side
    210,851.88x = 27,260,921,181.86
  5. Step 5: Solve for x
    x = 27,260,921,181.86/210,851.88
  6. Step 6: Final answer
    x = 129,289.44

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1.5x scale

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.