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Finding the Fourth Proportional to 154,046.60, 212,581.90 and 86,064.51

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Solution

The fourth proportional to 154,046.60, 212,581.90 and 86,064.51 is: 118,767.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,046.60 : 212,581.90 = 86,064.51 : x
  2. Step 2: Convert to fraction form
    154,046.60/212,581.90 = 86,064.51/x
  3. Step 3: Cross multiply
    154,046.60x = 212,581.90 × 86,064.51
  4. Step 4: Simplify right side
    154,046.60x = 18,295,757,058.37
  5. Step 5: Solve for x
    x = 18,295,757,058.37/154,046.60
  6. Step 6: Final answer
    x = 118,767.68

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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.