Home / 128,259.87-191,450.55-113,109.74

Finding the Fourth Proportional to 128,259.87, 191,450.55 and 113,109.74

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Solution

The fourth proportional to 128,259.87, 191,450.55 and 113,109.74 is: 168,836.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,259.87 : 191,450.55 = 113,109.74 : x
  2. Step 2: Convert to fraction form
    128,259.87/191,450.55 = 113,109.74/x
  3. Step 3: Cross multiply
    128,259.87x = 191,450.55 × 113,109.74
  4. Step 4: Simplify right side
    128,259.87x = 21,654,921,933.36
  5. Step 5: Solve for x
    x = 21,654,921,933.36/128,259.87
  6. Step 6: Final answer
    x = 168,836.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.