Home / 78,619.80-117,735.30-52,181.40

Finding the Fourth Proportional to 78,619.80, 117,735.30 and 52,181.40

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Solution

The fourth proportional to 78,619.80, 117,735.30 and 52,181.40 is: 78,143.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,619.80 : 117,735.30 = 52,181.40 : x
  2. Step 2: Convert to fraction form
    78,619.80/117,735.30 = 52,181.40/x
  3. Step 3: Cross multiply
    78,619.80x = 117,735.30 × 52,181.40
  4. Step 4: Simplify right side
    78,619.80x = 6,143,592,783.42
  5. Step 5: Solve for x
    x = 6,143,592,783.42/78,619.80
  6. Step 6: Final answer
    x = 78,143.07

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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.