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Finding the Fourth Proportional to 154,364.73, 213,034.77 and 86,388.51

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Solution

The fourth proportional to 154,364.73, 213,034.77 and 86,388.51 is: 119,222.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,364.73 : 213,034.77 = 86,388.51 : x
  2. Step 2: Convert to fraction form
    154,364.73/213,034.77 = 86,388.51/x
  3. Step 3: Cross multiply
    154,364.73x = 213,034.77 × 86,388.51
  4. Step 4: Simplify right side
    154,364.73x = 18,403,756,358.49
  5. Step 5: Solve for x
    x = 18,403,756,358.49/154,364.73
  6. Step 6: Final answer
    x = 119,222.55

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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.