Home / 128,932.32-177,933.60-72,342.48

Finding the Fourth Proportional to 128,932.32, 177,933.60 and 72,342.48

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Solution

The fourth proportional to 128,932.32, 177,933.60 and 72,342.48 is: 99,836.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,932.32 : 177,933.60 = 72,342.48 : x
  2. Step 2: Convert to fraction form
    128,932.32/177,933.60 = 72,342.48/x
  3. Step 3: Cross multiply
    128,932.32x = 177,933.60 × 72,342.48
  4. Step 4: Simplify right side
    128,932.32x = 12,872,157,899.33
  5. Step 5: Solve for x
    x = 12,872,157,899.33/128,932.32
  6. Step 6: Final answer
    x = 99,836.55

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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.