Home / 139,015.20-208,445.04-45,513.12

Finding the Fourth Proportional to 139,015.20, 208,445.04 and 45,513.12

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Solution

The fourth proportional to 139,015.20, 208,445.04 and 45,513.12 is: 68,244.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,015.20 : 208,445.04 = 45,513.12 : x
  2. Step 2: Convert to fraction form
    139,015.20/208,445.04 = 45,513.12/x
  3. Step 3: Cross multiply
    139,015.20x = 208,445.04 × 45,513.12
  4. Step 4: Simplify right side
    139,015.20x = 9,486,984,118.92
  5. Step 5: Solve for x
    x = 9,486,984,118.92/139,015.20
  6. Step 6: Final answer
    x = 68,244.22

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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.