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Finding the Fourth Proportional to 100,837.92, 139,216.23 and 89,627.88

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Solution

The fourth proportional to 100,837.92, 139,216.23 and 89,627.88 is: 123,739.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,837.92 : 139,216.23 = 89,627.88 : x
  2. Step 2: Convert to fraction form
    100,837.92/139,216.23 = 89,627.88/x
  3. Step 3: Cross multiply
    100,837.92x = 139,216.23 × 89,627.88
  4. Step 4: Simplify right side
    100,837.92x = 12,477,655,556.49
  5. Step 5: Solve for x
    x = 12,477,655,556.49/100,837.92
  6. Step 6: Final answer
    x = 123,739.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.