Home / 78,621.22-117,826.73-28,654.35

Finding the Fourth Proportional to 78,621.22, 117,826.73 and 28,654.35

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Solution

The fourth proportional to 78,621.22, 117,826.73 and 28,654.35 is: 42,943.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,621.22 : 117,826.73 = 28,654.35 : x
  2. Step 2: Convert to fraction form
    78,621.22/117,826.73 = 28,654.35/x
  3. Step 3: Cross multiply
    78,621.22x = 117,826.73 × 28,654.35
  4. Step 4: Simplify right side
    78,621.22x = 3,376,247,771.64
  5. Step 5: Solve for x
    x = 3,376,247,771.64/78,621.22
  6. Step 6: Final answer
    x = 42,943.21

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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.