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Finding the Fourth Proportional to 158,615.51, 218,890.49 and 86,996.04

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Solution

The fourth proportional to 158,615.51, 218,890.49 and 86,996.04 is: 120,055.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,615.51 : 218,890.49 = 86,996.04 : x
  2. Step 2: Convert to fraction form
    158,615.51/218,890.49 = 86,996.04/x
  3. Step 3: Cross multiply
    158,615.51x = 218,890.49 × 86,996.04
  4. Step 4: Simplify right side
    158,615.51x = 19,042,605,823.66
  5. Step 5: Solve for x
    x = 19,042,605,823.66/158,615.51
  6. Step 6: Final answer
    x = 120,055.13

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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.