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Finding the Fourth Proportional to 78,014.87, 117,025.64 and 30,640.23

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Solution

The fourth proportional to 78,014.87, 117,025.64 and 30,640.23 is: 45,961.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,014.87 : 117,025.64 = 30,640.23 : x
  2. Step 2: Convert to fraction form
    78,014.87/117,025.64 = 30,640.23/x
  3. Step 3: Cross multiply
    78,014.87x = 117,025.64 × 30,640.23
  4. Step 4: Simplify right side
    78,014.87x = 3,585,692,525.50
  5. Step 5: Solve for x
    x = 3,585,692,525.50/78,014.87
  6. Step 6: Final answer
    x = 45,961.65

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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.