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Finding the Fourth Proportional to 100,325.79, 138,448.98 and 55,005.68

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Solution

The fourth proportional to 100,325.79, 138,448.98 and 55,005.68 is: 75,907.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,325.79 : 138,448.98 = 55,005.68 : x
  2. Step 2: Convert to fraction form
    100,325.79/138,448.98 = 55,005.68/x
  3. Step 3: Cross multiply
    100,325.79x = 138,448.98 × 55,005.68
  4. Step 4: Simplify right side
    100,325.79x = 7,615,480,636.33
  5. Step 5: Solve for x
    x = 7,615,480,636.33/100,325.79
  6. Step 6: Final answer
    x = 75,907.51

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1.5x scale

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.