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Finding the Fourth Proportional to 135,161.16, 186,514.90 and 74,728.28

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Solution

The fourth proportional to 135,161.16, 186,514.90 and 74,728.28 is: 103,120.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,161.16 : 186,514.90 = 74,728.28 : x
  2. Step 2: Convert to fraction form
    135,161.16/186,514.90 = 74,728.28/x
  3. Step 3: Cross multiply
    135,161.16x = 186,514.90 × 74,728.28
  4. Step 4: Simplify right side
    135,161.16x = 13,937,937,671.37
  5. Step 5: Solve for x
    x = 13,937,937,671.37/135,161.16
  6. Step 6: Final answer
    x = 103,120.88

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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.