Home / 209,855.13-289,529.01-128,153.58

Finding the Fourth Proportional to 209,855.13, 289,529.01 and 128,153.58

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Solution

The fourth proportional to 209,855.13, 289,529.01 and 128,153.58 is: 176,808.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,855.13 : 289,529.01 = 128,153.58 : x
  2. Step 2: Convert to fraction form
    209,855.13/289,529.01 = 128,153.58/x
  3. Step 3: Cross multiply
    209,855.13x = 289,529.01 × 128,153.58
  4. Step 4: Simplify right side
    209,855.13x = 37,104,179,145.36
  5. Step 5: Solve for x
    x = 37,104,179,145.36/209,855.13
  6. Step 6: Final answer
    x = 176,808.54

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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.