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Finding the Fourth Proportional to 221,563.20, 332,344.80 and 81,303.60

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Solution

The fourth proportional to 221,563.20, 332,344.80 and 81,303.60 is: 121,955.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,563.20 : 332,344.80 = 81,303.60 : x
  2. Step 2: Convert to fraction form
    221,563.20/332,344.80 = 81,303.60/x
  3. Step 3: Cross multiply
    221,563.20x = 332,344.80 × 81,303.60
  4. Step 4: Simplify right side
    221,563.20x = 27,020,828,681.28
  5. Step 5: Solve for x
    x = 27,020,828,681.28/221,563.20
  6. Step 6: Final answer
    x = 121,955.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.