Home / 211,170.78-291,415.74-115,680.90

Finding the Fourth Proportional to 211,170.78, 291,415.74 and 115,680.90

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Solution

The fourth proportional to 211,170.78, 291,415.74 and 115,680.90 is: 159,639.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,170.78 : 291,415.74 = 115,680.90 : x
  2. Step 2: Convert to fraction form
    211,170.78/291,415.74 = 115,680.90/x
  3. Step 3: Cross multiply
    211,170.78x = 291,415.74 × 115,680.90
  4. Step 4: Simplify right side
    211,170.78x = 33,711,235,077.37
  5. Step 5: Solve for x
    x = 33,711,235,077.37/211,170.78
  6. Step 6: Final answer
    x = 159,639.68

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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.