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Finding the Fourth Proportional to 139,965.20, 210,012.60 and 73,480.40

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Solution

The fourth proportional to 139,965.20, 210,012.60 and 73,480.40 is: 110,254.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,965.20 : 210,012.60 = 73,480.40 : x
  2. Step 2: Convert to fraction form
    139,965.20/210,012.60 = 73,480.40/x
  3. Step 3: Cross multiply
    139,965.20x = 210,012.60 × 73,480.40
  4. Step 4: Simplify right side
    139,965.20x = 15,431,809,853.04
  5. Step 5: Solve for x
    x = 15,431,809,853.04/139,965.20
  6. Step 6: Final answer
    x = 110,254.62

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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.