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Finding the Fourth Proportional to 158,571.60, 218,828.70 and 86,952.78

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Solution

The fourth proportional to 158,571.60, 218,828.70 and 86,952.78 is: 119,994.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,571.60 : 218,828.70 = 86,952.78 : x
  2. Step 2: Convert to fraction form
    158,571.60/218,828.70 = 86,952.78/x
  3. Step 3: Cross multiply
    158,571.60x = 218,828.70 × 86,952.78
  4. Step 4: Simplify right side
    158,571.60x = 19,027,763,808.79
  5. Step 5: Solve for x
    x = 19,027,763,808.79/158,571.60
  6. Step 6: Final answer
    x = 119,994.78

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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.