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Finding the Fourth Proportional to 211,090.80, 316,866.60 and 117,778.80

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Solution

The fourth proportional to 211,090.80, 316,866.60 and 117,778.80 is: 176,796.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,090.80 : 316,866.60 = 117,778.80 : x
  2. Step 2: Convert to fraction form
    211,090.80/316,866.60 = 117,778.80/x
  3. Step 3: Cross multiply
    211,090.80x = 316,866.60 × 117,778.80
  4. Step 4: Simplify right side
    211,090.80x = 37,320,167,908.08
  5. Step 5: Solve for x
    x = 37,320,167,908.08/211,090.80
  6. Step 6: Final answer
    x = 176,796.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.