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Finding the Fourth Proportional to 158,534.85, 218,778.03 and 86,913.33

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Solution

The fourth proportional to 158,534.85, 218,778.03 and 86,913.33 is: 119,940.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,534.85 : 218,778.03 = 86,913.33 : x
  2. Step 2: Convert to fraction form
    158,534.85/218,778.03 = 86,913.33/x
  3. Step 3: Cross multiply
    158,534.85x = 218,778.03 × 86,913.33
  4. Step 4: Simplify right side
    158,534.85x = 19,014,727,118.14
  5. Step 5: Solve for x
    x = 19,014,727,118.14/158,534.85
  6. Step 6: Final answer
    x = 119,940.36

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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.