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Finding the Fourth Proportional to 218,965.74, 302,174.88 and 128,375.34

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Solution

The fourth proportional to 218,965.74, 302,174.88 and 128,375.34 is: 177,159.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,965.74 : 302,174.88 = 128,375.34 : x
  2. Step 2: Convert to fraction form
    218,965.74/302,174.88 = 128,375.34/x
  3. Step 3: Cross multiply
    218,965.74x = 302,174.88 × 128,375.34
  4. Step 4: Simplify right side
    218,965.74x = 38,791,802,959.46
  5. Step 5: Solve for x
    x = 38,791,802,959.46/218,965.74
  6. Step 6: Final answer
    x = 177,159.23

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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.