Home / 211,160.58-291,407.51-128,374.43

Finding the Fourth Proportional to 211,160.58, 291,407.51 and 128,374.43

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Solution

The fourth proportional to 211,160.58, 291,407.51 and 128,374.43 is: 177,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,160.58 : 291,407.51 = 128,374.43 : x
  2. Step 2: Convert to fraction form
    211,160.58/291,407.51 = 128,374.43/x
  3. Step 3: Cross multiply
    211,160.58x = 291,407.51 × 128,374.43
  4. Step 4: Simplify right side
    211,160.58x = 37,409,271,857.87
  5. Step 5: Solve for x
    x = 37,409,271,857.87/211,160.58
  6. Step 6: Final answer
    x = 177,160.30

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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.