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Finding the Fourth Proportional to 445,652.72, 668,431.52 and 125,796.72

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Solution

The fourth proportional to 445,652.72, 668,431.52 and 125,796.72 is: 188,681.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,652.72 : 668,431.52 = 125,796.72 : x
  2. Step 2: Convert to fraction form
    445,652.72/668,431.52 = 125,796.72/x
  3. Step 3: Cross multiply
    445,652.72x = 668,431.52 × 125,796.72
  4. Step 4: Simplify right side
    445,652.72x = 84,086,492,760.61
  5. Step 5: Solve for x
    x = 84,086,492,760.61/445,652.72
  6. Step 6: Final answer
    x = 188,681.65

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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.