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Finding the Fourth Proportional to 210,841.12, 316,259.84 and 86,094.56

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Solution

The fourth proportional to 210,841.12, 316,259.84 and 86,094.56 is: 129,141.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,841.12 : 316,259.84 = 86,094.56 : x
  2. Step 2: Convert to fraction form
    210,841.12/316,259.84 = 86,094.56/x
  3. Step 3: Cross multiply
    210,841.12x = 316,259.84 × 86,094.56
  4. Step 4: Simplify right side
    210,841.12x = 27,228,251,770.47
  5. Step 5: Solve for x
    x = 27,228,251,770.47/210,841.12
  6. Step 6: Final answer
    x = 129,141.09

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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.