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Finding the Fourth Proportional to 211,162.78, 291,404.70 and 115,672.90

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Solution

The fourth proportional to 211,162.78, 291,404.70 and 115,672.90 is: 159,628.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,162.78 : 291,404.70 = 115,672.90 : x
  2. Step 2: Convert to fraction form
    211,162.78/291,404.70 = 115,672.90/x
  3. Step 3: Cross multiply
    211,162.78x = 291,404.70 × 115,672.90
  4. Step 4: Simplify right side
    211,162.78x = 33,707,626,722.63
  5. Step 5: Solve for x
    x = 33,707,626,722.63/211,162.78
  6. Step 6: Final answer
    x = 159,628.64

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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.