Home / 211,579.85-291,903.52-139,021.76

Finding the Fourth Proportional to 211,579.85, 291,903.52 and 139,021.76

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Solution

The fourth proportional to 211,579.85, 291,903.52 and 139,021.76 is: 191,799.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,579.85 : 291,903.52 = 139,021.76 : x
  2. Step 2: Convert to fraction form
    211,579.85/291,903.52 = 139,021.76/x
  3. Step 3: Cross multiply
    211,579.85x = 291,903.52 × 139,021.76
  4. Step 4: Simplify right side
    211,579.85x = 40,580,941,100.60
  5. Step 5: Solve for x
    x = 40,580,941,100.60/211,579.85
  6. Step 6: Final answer
    x = 191,799.65

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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.