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Finding the Fourth Proportional to 54,523.40, 81,787.80 and 28,279.40

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Solution

The fourth proportional to 54,523.40, 81,787.80 and 28,279.40 is: 42,420.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,523.40 : 81,787.80 = 28,279.40 : x
  2. Step 2: Convert to fraction form
    54,523.40/81,787.80 = 28,279.40/x
  3. Step 3: Cross multiply
    54,523.40x = 81,787.80 × 28,279.40
  4. Step 4: Simplify right side
    54,523.40x = 2,312,909,911.32
  5. Step 5: Solve for x
    x = 2,312,909,911.32/54,523.40
  6. Step 6: Final answer
    x = 42,420.50

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1.5x scale

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.