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Finding the Fourth Proportional to 54,615.84, 81,975.12 and 28,339.20

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Solution

The fourth proportional to 54,615.84, 81,975.12 and 28,339.20 is: 42,535.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,615.84 : 81,975.12 = 28,339.20 : x
  2. Step 2: Convert to fraction form
    54,615.84/81,975.12 = 28,339.20/x
  3. Step 3: Cross multiply
    54,615.84x = 81,975.12 × 28,339.20
  4. Step 4: Simplify right side
    54,615.84x = 2,323,109,320.70
  5. Step 5: Solve for x
    x = 2,323,109,320.70/54,615.84
  6. Step 6: Final answer
    x = 42,535.45

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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.