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Finding the Fourth Proportional to 100,965.60, 139,367.52 and 69,239.52

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Solution

The fourth proportional to 100,965.60, 139,367.52 and 69,239.52 is: 95,574.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,965.60 : 139,367.52 = 69,239.52 : x
  2. Step 2: Convert to fraction form
    100,965.60/139,367.52 = 69,239.52/x
  3. Step 3: Cross multiply
    100,965.60x = 139,367.52 × 69,239.52
  4. Step 4: Simplify right side
    100,965.60x = 9,649,740,188.39
  5. Step 5: Solve for x
    x = 9,649,740,188.39/100,965.60
  6. Step 6: Final answer
    x = 95,574.53

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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.