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Finding the Fourth Proportional to 139,832.57, 192,968.65 and 76,170.22

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Solution

The fourth proportional to 139,832.57, 192,968.65 and 76,170.22 is: 105,114.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,832.57 : 192,968.65 = 76,170.22 : x
  2. Step 2: Convert to fraction form
    139,832.57/192,968.65 = 76,170.22/x
  3. Step 3: Cross multiply
    139,832.57x = 192,968.65 × 76,170.22
  4. Step 4: Simplify right side
    139,832.57x = 14,698,464,523.60
  5. Step 5: Solve for x
    x = 14,698,464,523.60/139,832.57
  6. Step 6: Final answer
    x = 105,114.74

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1.5x scale

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.