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Finding the Fourth Proportional to 91,412.64, 136,924.56 and 53,932.32

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Solution

The fourth proportional to 91,412.64, 136,924.56 and 53,932.32 is: 80,783.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,412.64 : 136,924.56 = 53,932.32 : x
  2. Step 2: Convert to fraction form
    91,412.64/136,924.56 = 53,932.32/x
  3. Step 3: Cross multiply
    91,412.64x = 136,924.56 × 53,932.32
  4. Step 4: Simplify right side
    91,412.64x = 7,384,659,185.78
  5. Step 5: Solve for x
    x = 7,384,659,185.78/91,412.64
  6. Step 6: Final answer
    x = 80,783.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.