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Finding the Fourth Proportional to 54,272.70, 81,423.45 and 19,208.70

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Solution

The fourth proportional to 54,272.70, 81,423.45 and 19,208.70 is: 28,818.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,272.70 : 81,423.45 = 19,208.70 : x
  2. Step 2: Convert to fraction form
    54,272.70/81,423.45 = 19,208.70/x
  3. Step 3: Cross multiply
    54,272.70x = 81,423.45 × 19,208.70
  4. Step 4: Simplify right side
    54,272.70x = 1,564,038,624.02
  5. Step 5: Solve for x
    x = 1,564,038,624.02/54,272.70
  6. Step 6: Final answer
    x = 28,818.15

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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.