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Finding the Fourth Proportional to 154,796.50, 213,628.49 and 86,817.49

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Solution

The fourth proportional to 154,796.50, 213,628.49 and 86,817.49 is: 119,813.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,796.50 : 213,628.49 = 86,817.49 : x
  2. Step 2: Convert to fraction form
    154,796.50/213,628.49 = 86,817.49/x
  3. Step 3: Cross multiply
    154,796.50x = 213,628.49 × 86,817.49
  4. Step 4: Simplify right side
    154,796.50x = 18,546,689,294.29
  5. Step 5: Solve for x
    x = 18,546,689,294.29/154,796.50
  6. Step 6: Final answer
    x = 119,813.36

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1.5x scale

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.