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Finding the Fourth Proportional to 158,615.49, 218,892.78 and 86,995.32

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Solution

The fourth proportional to 158,615.49, 218,892.78 and 86,995.32 is: 120,055.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,615.49 : 218,892.78 = 86,995.32 : x
  2. Step 2: Convert to fraction form
    158,615.49/218,892.78 = 86,995.32/x
  3. Step 3: Cross multiply
    158,615.49x = 218,892.78 × 86,995.32
  4. Step 4: Simplify right side
    158,615.49x = 19,042,647,441.79
  5. Step 5: Solve for x
    x = 19,042,647,441.79/158,615.49
  6. Step 6: Final answer
    x = 120,055.41

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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.