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Finding the Fourth Proportional to 74,119.70, 102,286.01 and 40,128.92

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Solution

The fourth proportional to 74,119.70, 102,286.01 and 40,128.92 is: 55,378.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,119.70 : 102,286.01 = 40,128.92 : x
  2. Step 2: Convert to fraction form
    74,119.70/102,286.01 = 40,128.92/x
  3. Step 3: Cross multiply
    74,119.70x = 102,286.01 × 40,128.92
  4. Step 4: Simplify right side
    74,119.70x = 4,104,627,434.51
  5. Step 5: Solve for x
    x = 4,104,627,434.51/74,119.70
  6. Step 6: Final answer
    x = 55,378.36

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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.