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Finding the Fourth Proportional to 217,111.80, 325,619.10 and 142,753.80

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Solution

The fourth proportional to 217,111.80, 325,619.10 and 142,753.80 is: 214,098.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,111.80 : 325,619.10 = 142,753.80 : x
  2. Step 2: Convert to fraction form
    217,111.80/325,619.10 = 142,753.80/x
  3. Step 3: Cross multiply
    217,111.80x = 325,619.10 × 142,753.80
  4. Step 4: Simplify right side
    217,111.80x = 46,483,363,877.58
  5. Step 5: Solve for x
    x = 46,483,363,877.58/217,111.80
  6. Step 6: Final answer
    x = 214,098.74

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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.