Home / 211,170.76-291,281.40-138,578.36

Finding the Fourth Proportional to 211,170.76, 291,281.40 and 138,578.36

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Solution

The fourth proportional to 211,170.76, 291,281.40 and 138,578.36 is: 191,150.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,170.76 : 291,281.40 = 138,578.36 : x
  2. Step 2: Convert to fraction form
    211,170.76/291,281.40 = 138,578.36/x
  3. Step 3: Cross multiply
    211,170.76x = 291,281.40 × 138,578.36
  4. Step 4: Simplify right side
    211,170.76x = 40,365,297,254.10
  5. Step 5: Solve for x
    x = 40,365,297,254.10/211,170.76
  6. Step 6: Final answer
    x = 191,150.03

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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.