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Finding the Fourth Proportional to 158,364.54, 218,535.30 and 86,744.88

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Solution

The fourth proportional to 158,364.54, 218,535.30 and 86,744.88 is: 119,703.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,364.54 : 218,535.30 = 86,744.88 : x
  2. Step 2: Convert to fraction form
    158,364.54/218,535.30 = 86,744.88/x
  3. Step 3: Cross multiply
    158,364.54x = 218,535.30 × 86,744.88
  4. Step 4: Simplify right side
    158,364.54x = 18,956,818,374.26
  5. Step 5: Solve for x
    x = 18,956,818,374.26/158,364.54
  6. Step 6: Final answer
    x = 119,703.68

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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.