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Finding the Fourth Proportional to 81,271.60, 121,907.40 and 41,905.60

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Solution

The fourth proportional to 81,271.60, 121,907.40 and 41,905.60 is: 62,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,271.60 : 121,907.40 = 41,905.60 : x
  2. Step 2: Convert to fraction form
    81,271.60/121,907.40 = 41,905.60/x
  3. Step 3: Cross multiply
    81,271.60x = 121,907.40 × 41,905.60
  4. Step 4: Simplify right side
    81,271.60x = 5,108,602,741.44
  5. Step 5: Solve for x
    x = 5,108,602,741.44/81,271.60
  6. Step 6: Final answer
    x = 62,858.40

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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.