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Finding the Fourth Proportional to 54,608.40, 81,915.30 and 28,364.40

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Solution

The fourth proportional to 54,608.40, 81,915.30 and 28,364.40 is: 42,548.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,608.40 : 81,915.30 = 28,364.40 : x
  2. Step 2: Convert to fraction form
    54,608.40/81,915.30 = 28,364.40/x
  3. Step 3: Cross multiply
    54,608.40x = 81,915.30 × 28,364.40
  4. Step 4: Simplify right side
    54,608.40x = 2,323,478,335.32
  5. Step 5: Solve for x
    x = 2,323,478,335.32/54,608.40
  6. Step 6: Final answer
    x = 42,548.00

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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.