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Finding the Fourth Proportional to 154,363.04, 213,013.72 and 86,388.64

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Solution

The fourth proportional to 154,363.04, 213,013.72 and 86,388.64 is: 119,212.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,363.04 : 213,013.72 = 86,388.64 : x
  2. Step 2: Convert to fraction form
    154,363.04/213,013.72 = 86,388.64/x
  3. Step 3: Cross multiply
    154,363.04x = 213,013.72 × 86,388.64
  4. Step 4: Simplify right side
    154,363.04x = 18,401,965,572.14
  5. Step 5: Solve for x
    x = 18,401,965,572.14/154,363.04
  6. Step 6: Final answer
    x = 119,212.25

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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.