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Finding the Fourth Proportional to 154,664, 213,432.69 and 91,005.92

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Solution

The fourth proportional to 154,664, 213,432.69 and 91,005.92 is: 125,586.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,664 : 213,432.69 = 91,005.92 : x
  2. Step 2: Convert to fraction form
    154,664/213,432.69 = 91,005.92/x
  3. Step 3: Cross multiply
    154,664x = 213,432.69 × 91,005.92
  4. Step 4: Simplify right side
    154,664x = 19,423,638,311.52
  5. Step 5: Solve for x
    x = 19,423,638,311.52/154,664
  6. Step 6: Final answer
    x = 125,586.03

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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.