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Finding the Fourth Proportional to 145,207.78, 217,841.91 and 45,363.94

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Solution

The fourth proportional to 145,207.78, 217,841.91 and 45,363.94 is: 68,055.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,207.78 : 217,841.91 = 45,363.94 : x
  2. Step 2: Convert to fraction form
    145,207.78/217,841.91 = 45,363.94/x
  3. Step 3: Cross multiply
    145,207.78x = 217,841.91 × 45,363.94
  4. Step 4: Simplify right side
    145,207.78x = 9,882,167,334.73
  5. Step 5: Solve for x
    x = 9,882,167,334.73/145,207.78
  6. Step 6: Final answer
    x = 68,055.36

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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.