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Finding the Fourth Proportional to 245,438.72, 368,138.62 and 87,650.72

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Solution

The fourth proportional to 245,438.72, 368,138.62 and 87,650.72 is: 131,469.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,438.72 : 368,138.62 = 87,650.72 : x
  2. Step 2: Convert to fraction form
    245,438.72/368,138.62 = 87,650.72/x
  3. Step 3: Cross multiply
    245,438.72x = 368,138.62 × 87,650.72
  4. Step 4: Simplify right side
    245,438.72x = 32,267,615,102.81
  5. Step 5: Solve for x
    x = 32,267,615,102.81/245,438.72
  6. Step 6: Final answer
    x = 131,469.13

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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.