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Finding the Fourth Proportional to 100,806.28, 139,054.72 and 63,014.92

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Solution

The fourth proportional to 100,806.28, 139,054.72 and 63,014.92 is: 86,924.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,806.28 : 139,054.72 = 63,014.92 : x
  2. Step 2: Convert to fraction form
    100,806.28/139,054.72 = 63,014.92/x
  3. Step 3: Cross multiply
    100,806.28x = 139,054.72 × 63,014.92
  4. Step 4: Simplify right side
    100,806.28x = 8,762,522,056.42
  5. Step 5: Solve for x
    x = 8,762,522,056.42/100,806.28
  6. Step 6: Final answer
    x = 86,924.37

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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.