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Finding the Fourth Proportional to 145,219.72, 217,843.02 and 56,479.96

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Solution

The fourth proportional to 145,219.72, 217,843.02 and 56,479.96 is: 84,725.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,219.72 : 217,843.02 = 56,479.96 : x
  2. Step 2: Convert to fraction form
    145,219.72/217,843.02 = 56,479.96/x
  3. Step 3: Cross multiply
    145,219.72x = 217,843.02 × 56,479.96
  4. Step 4: Simplify right side
    145,219.72x = 12,303,765,055.88
  5. Step 5: Solve for x
    x = 12,303,765,055.88/145,219.72
  6. Step 6: Final answer
    x = 84,725.17

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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.