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Finding the Fourth Proportional to 210,883.89, 316,327.05 and 86,224.89

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Solution

The fourth proportional to 210,883.89, 316,327.05 and 86,224.89 is: 129,337.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,883.89 : 316,327.05 = 86,224.89 : x
  2. Step 2: Convert to fraction form
    210,883.89/316,327.05 = 86,224.89/x
  3. Step 3: Cross multiply
    210,883.89x = 316,327.05 × 86,224.89
  4. Step 4: Simplify right side
    210,883.89x = 27,275,265,090.27
  5. Step 5: Solve for x
    x = 27,275,265,090.27/210,883.89
  6. Step 6: Final answer
    x = 129,337.83

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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.