Home / 210,087.72-289,868.58-128,395.08

Finding the Fourth Proportional to 210,087.72, 289,868.58 and 128,395.08

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Solution

The fourth proportional to 210,087.72, 289,868.58 and 128,395.08 is: 177,153.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,087.72 : 289,868.58 = 128,395.08 : x
  2. Step 2: Convert to fraction form
    210,087.72/289,868.58 = 128,395.08/x
  3. Step 3: Cross multiply
    210,087.72x = 289,868.58 × 128,395.08
  4. Step 4: Simplify right side
    210,087.72x = 37,217,699,518.59
  5. Step 5: Solve for x
    x = 37,217,699,518.59/210,087.72
  6. Step 6: Final answer
    x = 177,153.14

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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.