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Finding the Fourth Proportional to 131,790.72, 197,718.72 and 38,297.28

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Solution

The fourth proportional to 131,790.72, 197,718.72 and 38,297.28 is: 57,455.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,790.72 : 197,718.72 = 38,297.28 : x
  2. Step 2: Convert to fraction form
    131,790.72/197,718.72 = 38,297.28/x
  3. Step 3: Cross multiply
    131,790.72x = 197,718.72 × 38,297.28
  4. Step 4: Simplify right side
    131,790.72x = 7,572,089,181.08
  5. Step 5: Solve for x
    x = 7,572,089,181.08/131,790.72
  6. Step 6: Final answer
    x = 57,455.40

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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.