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Finding the Fourth Proportional to 145,220.72, 217,844.52 and 56,480.96

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Solution

The fourth proportional to 145,220.72, 217,844.52 and 56,480.96 is: 84,726.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,220.72 : 217,844.52 = 56,480.96 : x
  2. Step 2: Convert to fraction form
    145,220.72/217,844.52 = 56,480.96/x
  3. Step 3: Cross multiply
    145,220.72x = 217,844.52 × 56,480.96
  4. Step 4: Simplify right side
    145,220.72x = 12,304,067,620.34
  5. Step 5: Solve for x
    x = 12,304,067,620.34/145,220.72
  6. Step 6: Final answer
    x = 84,726.67

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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.