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Finding the Fourth Proportional to 135,406.88, 186,859.19 and 74,976.22

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Solution

The fourth proportional to 135,406.88, 186,859.19 and 74,976.22 is: 103,465.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,406.88 : 186,859.19 = 74,976.22 : x
  2. Step 2: Convert to fraction form
    135,406.88/186,859.19 = 74,976.22/x
  3. Step 3: Cross multiply
    135,406.88x = 186,859.19 × 74,976.22
  4. Step 4: Simplify right side
    135,406.88x = 14,009,995,458.75
  5. Step 5: Solve for x
    x = 14,009,995,458.75/135,406.88
  6. Step 6: Final answer
    x = 103,465.91

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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.