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Finding the Fourth Proportional to 158,693.38, 218,962.65 and 91,586.50

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Solution

The fourth proportional to 158,693.38, 218,962.65 and 91,586.50 is: 126,369.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,693.38 : 218,962.65 = 91,586.50 : x
  2. Step 2: Convert to fraction form
    158,693.38/218,962.65 = 91,586.50/x
  3. Step 3: Cross multiply
    158,693.38x = 218,962.65 × 91,586.50
  4. Step 4: Simplify right side
    158,693.38x = 20,054,022,744.23
  5. Step 5: Solve for x
    x = 20,054,022,744.23/158,693.38
  6. Step 6: Final answer
    x = 126,369.62

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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.