Home / 78,627.20-117,940.80-52,246.40

Finding the Fourth Proportional to 78,627.20, 117,940.80 and 52,246.40

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Solution

The fourth proportional to 78,627.20, 117,940.80 and 52,246.40 is: 78,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,627.20 : 117,940.80 = 52,246.40 : x
  2. Step 2: Convert to fraction form
    78,627.20/117,940.80 = 52,246.40/x
  3. Step 3: Cross multiply
    78,627.20x = 117,940.80 × 52,246.40
  4. Step 4: Simplify right side
    78,627.20x = 6,161,982,213.12
  5. Step 5: Solve for x
    x = 6,161,982,213.12/78,627.20
  6. Step 6: Final answer
    x = 78,369.60

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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.