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Finding the Fourth Proportional to 167,638.40, 251,749.20 and 162,389.60

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Solution

The fourth proportional to 167,638.40, 251,749.20 and 162,389.60 is: 243,866.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,638.40 : 251,749.20 = 162,389.60 : x
  2. Step 2: Convert to fraction form
    167,638.40/251,749.20 = 162,389.60/x
  3. Step 3: Cross multiply
    167,638.40x = 251,749.20 × 162,389.60
  4. Step 4: Simplify right side
    167,638.40x = 40,881,451,888.32
  5. Step 5: Solve for x
    x = 40,881,451,888.32/167,638.40
  6. Step 6: Final answer
    x = 243,866.87

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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.