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Finding the Fourth Proportional to 158,368.83, 218,551.85 and 86,744.28

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Solution

The fourth proportional to 158,368.83, 218,551.85 and 86,744.28 is: 119,708.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,368.83 : 218,551.85 = 86,744.28 : x
  2. Step 2: Convert to fraction form
    158,368.83/218,551.85 = 86,744.28/x
  3. Step 3: Cross multiply
    158,368.83x = 218,551.85 × 86,744.28
  4. Step 4: Simplify right side
    158,368.83x = 18,958,122,870.92
  5. Step 5: Solve for x
    x = 18,958,122,870.92/158,368.83
  6. Step 6: Final answer
    x = 119,708.68

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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.