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Finding the Fourth Proportional to 54,159.60, 81,239.40 and 47,247.60

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Solution

The fourth proportional to 54,159.60, 81,239.40 and 47,247.60 is: 70,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,159.60 : 81,239.40 = 47,247.60 : x
  2. Step 2: Convert to fraction form
    54,159.60/81,239.40 = 47,247.60/x
  3. Step 3: Cross multiply
    54,159.60x = 81,239.40 × 47,247.60
  4. Step 4: Simplify right side
    54,159.60x = 3,838,366,675.44
  5. Step 5: Solve for x
    x = 3,838,366,675.44/54,159.60
  6. Step 6: Final answer
    x = 70,871.40

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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.