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Finding the Fourth Proportional to 211,212, 291,605.04 and 135,891.36

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Solution

The fourth proportional to 211,212, 291,605.04 and 135,891.36 is: 187,615.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,212 : 291,605.04 = 135,891.36 : x
  2. Step 2: Convert to fraction form
    211,212/291,605.04 = 135,891.36/x
  3. Step 3: Cross multiply
    211,212x = 291,605.04 × 135,891.36
  4. Step 4: Simplify right side
    211,212x = 39,626,605,468.45
  5. Step 5: Solve for x
    x = 39,626,605,468.45/211,212
  6. Step 6: Final answer
    x = 187,615.31

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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.