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Finding the Fourth Proportional to 212,301.81, 318,452.72 and 54,530.42

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Solution

The fourth proportional to 212,301.81, 318,452.72 and 54,530.42 is: 81,795.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,301.81 : 318,452.72 = 54,530.42 : x
  2. Step 2: Convert to fraction form
    212,301.81/318,452.72 = 54,530.42/x
  3. Step 3: Cross multiply
    212,301.81x = 318,452.72 × 54,530.42
  4. Step 4: Simplify right side
    212,301.81x = 17,365,358,706.83
  5. Step 5: Solve for x
    x = 17,365,358,706.83/212,301.81
  6. Step 6: Final answer
    x = 81,795.62

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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.