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Finding the Fourth Proportional to 145,209.78, 217,844.91 and 45,365.94

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Solution

The fourth proportional to 145,209.78, 217,844.91 and 45,365.94 is: 68,058.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,209.78 : 217,844.91 = 45,365.94 : x
  2. Step 2: Convert to fraction form
    145,209.78/217,844.91 = 45,365.94/x
  3. Step 3: Cross multiply
    145,209.78x = 217,844.91 × 45,365.94
  4. Step 4: Simplify right side
    145,209.78x = 9,882,739,116.37
  5. Step 5: Solve for x
    x = 9,882,739,116.37/145,209.78
  6. Step 6: Final answer
    x = 68,058.36

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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.