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Finding the Fourth Proportional to 154,485, 213,164.64 and 86,504.94

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Solution

The fourth proportional to 154,485, 213,164.64 and 86,504.94 is: 119,363.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,485 : 213,164.64 = 86,504.94 : x
  2. Step 2: Convert to fraction form
    154,485/213,164.64 = 86,504.94/x
  3. Step 3: Cross multiply
    154,485x = 213,164.64 × 86,504.94
  4. Step 4: Simplify right side
    154,485x = 18,439,794,393.32
  5. Step 5: Solve for x
    x = 18,439,794,393.32/154,485
  6. Step 6: Final answer
    x = 119,363.01

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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.