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Finding the Fourth Proportional to 154,571.52, 213,291.20 and 86,579.20

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Solution

The fourth proportional to 154,571.52, 213,291.20 and 86,579.20 is: 119,469.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,571.52 : 213,291.20 = 86,579.20 : x
  2. Step 2: Convert to fraction form
    154,571.52/213,291.20 = 86,579.20/x
  3. Step 3: Cross multiply
    154,571.52x = 213,291.20 × 86,579.20
  4. Step 4: Simplify right side
    154,571.52x = 18,466,581,463.04
  5. Step 5: Solve for x
    x = 18,466,581,463.04/154,571.52
  6. Step 6: Final answer
    x = 119,469.50

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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.