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Finding the Fourth Proportional to 158,679, 218,977.02 and 91,611

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Solution

The fourth proportional to 158,679, 218,977.02 and 91,611 is: 126,423.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,679 : 218,977.02 = 91,611 : x
  2. Step 2: Convert to fraction form
    158,679/218,977.02 = 91,611/x
  3. Step 3: Cross multiply
    158,679x = 218,977.02 × 91,611
  4. Step 4: Simplify right side
    158,679x = 20,060,703,779.22
  5. Step 5: Solve for x
    x = 20,060,703,779.22/158,679
  6. Step 6: Final answer
    x = 126,423.18

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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.