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Finding the Fourth Proportional to 218,881.58, 302,061.20 and 123,388.28

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Solution

The fourth proportional to 218,881.58, 302,061.20 and 123,388.28 is: 170,278.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,881.58 : 302,061.20 = 123,388.28 : x
  2. Step 2: Convert to fraction form
    218,881.58/302,061.20 = 123,388.28/x
  3. Step 3: Cross multiply
    218,881.58x = 302,061.20 × 123,388.28
  4. Step 4: Simplify right side
    218,881.58x = 37,270,809,795.49
  5. Step 5: Solve for x
    x = 37,270,809,795.49/218,881.58
  6. Step 6: Final answer
    x = 170,278.42

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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.