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Finding the Fourth Proportional to 158,409.62, 218,605.28 and 86,792.36

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Solution

The fourth proportional to 158,409.62, 218,605.28 and 86,792.36 is: 119,773.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,409.62 : 218,605.28 = 86,792.36 : x
  2. Step 2: Convert to fraction form
    158,409.62/218,605.28 = 86,792.36/x
  3. Step 3: Cross multiply
    158,409.62x = 218,605.28 × 86,792.36
  4. Step 4: Simplify right side
    158,409.62x = 18,973,268,159.66
  5. Step 5: Solve for x
    x = 18,973,268,159.66/158,409.62
  6. Step 6: Final answer
    x = 119,773.46

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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.