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Finding the Fourth Proportional to 86,052.55, 118,745.09 and 47,811.40

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Solution

The fourth proportional to 86,052.55, 118,745.09 and 47,811.40 is: 65,975.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,052.55 : 118,745.09 = 47,811.40 : x
  2. Step 2: Convert to fraction form
    86,052.55/118,745.09 = 47,811.40/x
  3. Step 3: Cross multiply
    86,052.55x = 118,745.09 × 47,811.40
  4. Step 4: Simplify right side
    86,052.55x = 5,677,368,460.11
  5. Step 5: Solve for x
    x = 5,677,368,460.11/86,052.55
  6. Step 6: Final answer
    x = 65,975.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.