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Finding the Fourth Proportional to 212,154.56, 318,211.20 and 71,896.64

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Solution

The fourth proportional to 212,154.56, 318,211.20 and 71,896.64 is: 107,837.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,154.56 : 318,211.20 = 71,896.64 : x
  2. Step 2: Convert to fraction form
    212,154.56/318,211.20 = 71,896.64/x
  3. Step 3: Cross multiply
    212,154.56x = 318,211.20 × 71,896.64
  4. Step 4: Simplify right side
    212,154.56x = 22,878,316,090.37
  5. Step 5: Solve for x
    x = 22,878,316,090.37/212,154.56
  6. Step 6: Final answer
    x = 107,837.97

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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.