Home / 211,023.19-291,180.57-128,194.21

Finding the Fourth Proportional to 211,023.19, 291,180.57 and 128,194.21

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Solution

The fourth proportional to 211,023.19, 291,180.57 and 128,194.21 is: 176,888.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,023.19 : 291,180.57 = 128,194.21 : x
  2. Step 2: Convert to fraction form
    211,023.19/291,180.57 = 128,194.21/x
  3. Step 3: Cross multiply
    211,023.19x = 291,180.57 × 128,194.21
  4. Step 4: Simplify right side
    211,023.19x = 37,327,661,682.60
  5. Step 5: Solve for x
    x = 37,327,661,682.60/211,023.19
  6. Step 6: Final answer
    x = 176,888.91

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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.