Home / 420,090.56-629,925.60-139,509.44

Finding the Fourth Proportional to 420,090.56, 629,925.60 and 139,509.44

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Solution

The fourth proportional to 420,090.56, 629,925.60 and 139,509.44 is: 209,194.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,090.56 : 629,925.60 = 139,509.44 : x
  2. Step 2: Convert to fraction form
    420,090.56/629,925.60 = 139,509.44/x
  3. Step 3: Cross multiply
    420,090.56x = 629,925.60 × 139,509.44
  4. Step 4: Simplify right side
    420,090.56x = 87,880,567,697.66
  5. Step 5: Solve for x
    x = 87,880,567,697.66/420,090.56
  6. Step 6: Final answer
    x = 209,194.34

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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.