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Finding the Fourth Proportional to 154,663, 213,431.31 and 91,004.92

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Solution

The fourth proportional to 154,663, 213,431.31 and 91,004.92 is: 125,584.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,663 : 213,431.31 = 91,004.92 : x
  2. Step 2: Convert to fraction form
    154,663/213,431.31 = 91,004.92/x
  3. Step 3: Cross multiply
    154,663x = 213,431.31 × 91,004.92
  4. Step 4: Simplify right side
    154,663x = 19,423,299,292.05
  5. Step 5: Solve for x
    x = 19,423,299,292.05/154,663
  6. Step 6: Final answer
    x = 125,584.65

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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.