Home / 218,971.06-302,180.26-128,308.97

Finding the Fourth Proportional to 218,971.06, 302,180.26 and 128,308.97

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Solution

The fourth proportional to 218,971.06, 302,180.26 and 128,308.97 is: 177,066.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,971.06 : 302,180.26 = 128,308.97 : x
  2. Step 2: Convert to fraction form
    218,971.06/302,180.26 = 128,308.97/x
  3. Step 3: Cross multiply
    218,971.06x = 302,180.26 × 128,308.97
  4. Step 4: Simplify right side
    218,971.06x = 38,772,437,914.93
  5. Step 5: Solve for x
    x = 38,772,437,914.93/218,971.06
  6. Step 6: Final answer
    x = 177,066.49

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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.