Home / 189,729.56-261,522.29-128,456.21

Finding the Fourth Proportional to 189,729.56, 261,522.29 and 128,456.21

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Solution

The fourth proportional to 189,729.56, 261,522.29 and 128,456.21 is: 177,063.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,729.56 : 261,522.29 = 128,456.21 : x
  2. Step 2: Convert to fraction form
    189,729.56/261,522.29 = 128,456.21/x
  3. Step 3: Cross multiply
    189,729.56x = 261,522.29 × 128,456.21
  4. Step 4: Simplify right side
    189,729.56x = 33,594,163,178.87
  5. Step 5: Solve for x
    x = 33,594,163,178.87/189,729.56
  6. Step 6: Final answer
    x = 177,063.41

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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.