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Finding the Fourth Proportional to 213,617.72, 320,490.80 and 63,862.88

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Solution

The fourth proportional to 213,617.72, 320,490.80 and 63,862.88 is: 95,813.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,617.72 : 320,490.80 = 63,862.88 : x
  2. Step 2: Convert to fraction form
    213,617.72/320,490.80 = 63,862.88/x
  3. Step 3: Cross multiply
    213,617.72x = 320,490.80 × 63,862.88
  4. Step 4: Simplify right side
    213,617.72x = 20,467,464,058.71
  5. Step 5: Solve for x
    x = 20,467,464,058.71/213,617.72
  6. Step 6: Final answer
    x = 95,813.51

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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.