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Finding the Fourth Proportional to 311,501.25, 429,871.89 and 168,261.29

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Solution

The fourth proportional to 311,501.25, 429,871.89 and 168,261.29 is: 232,200.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,501.25 : 429,871.89 = 168,261.29 : x
  2. Step 2: Convert to fraction form
    311,501.25/429,871.89 = 168,261.29/x
  3. Step 3: Cross multiply
    311,501.25x = 429,871.89 × 168,261.29
  4. Step 4: Simplify right side
    311,501.25x = 72,330,797,250.81
  5. Step 5: Solve for x
    x = 72,330,797,250.81/311,501.25
  6. Step 6: Final answer
    x = 232,200.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.