Home / 211,520.05-291,732.71-130,992.28

Finding the Fourth Proportional to 211,520.05, 291,732.71 and 130,992.28

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Solution

The fourth proportional to 211,520.05, 291,732.71 and 130,992.28 is: 180,667.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,520.05 : 291,732.71 = 130,992.28 : x
  2. Step 2: Convert to fraction form
    211,520.05/291,732.71 = 130,992.28/x
  3. Step 3: Cross multiply
    211,520.05x = 291,732.71 × 130,992.28
  4. Step 4: Simplify right side
    211,520.05x = 38,214,731,449.19
  5. Step 5: Solve for x
    x = 38,214,731,449.19/211,520.05
  6. Step 6: Final answer
    x = 180,667.18

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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.