Home / 218,945.07-302,147.55-128,279.34

Finding the Fourth Proportional to 218,945.07, 302,147.55 and 128,279.34

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Solution

The fourth proportional to 218,945.07, 302,147.55 and 128,279.34 is: 177,027.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,945.07 : 302,147.55 = 128,279.34 : x
  2. Step 2: Convert to fraction form
    218,945.07/302,147.55 = 128,279.34/x
  3. Step 3: Cross multiply
    218,945.07x = 302,147.55 × 128,279.34
  4. Step 4: Simplify right side
    218,945.07x = 38,759,288,296.62
  5. Step 5: Solve for x
    x = 38,759,288,296.62/218,945.07
  6. Step 6: Final answer
    x = 177,027.45

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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.