Home / 218,786.40-301,927.68-128,122.56

Finding the Fourth Proportional to 218,786.40, 301,927.68 and 128,122.56

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Solution

The fourth proportional to 218,786.40, 301,927.68 and 128,122.56 is: 176,810.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,786.40 : 301,927.68 = 128,122.56 : x
  2. Step 2: Convert to fraction form
    218,786.40/301,927.68 = 128,122.56/x
  3. Step 3: Cross multiply
    218,786.40x = 301,927.68 × 128,122.56
  4. Step 4: Simplify right side
    218,786.40x = 38,683,747,296.46
  5. Step 5: Solve for x
    x = 38,683,747,296.46/218,786.40
  6. Step 6: Final answer
    x = 176,810.57

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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.