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Finding the Fourth Proportional to 158,456.73, 218,670.29 and 86,838.41

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Solution

The fourth proportional to 158,456.73, 218,670.29 and 86,838.41 is: 119,837.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,456.73 : 218,670.29 = 86,838.41 : x
  2. Step 2: Convert to fraction form
    158,456.73/218,670.29 = 86,838.41/x
  3. Step 3: Cross multiply
    158,456.73x = 218,670.29 × 86,838.41
  4. Step 4: Simplify right side
    158,456.73x = 18,988,980,297.84
  5. Step 5: Solve for x
    x = 18,988,980,297.84/158,456.73
  6. Step 6: Final answer
    x = 119,837.01

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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.