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Finding the Fourth Proportional to 211,151.71, 291,308.28 and 120,512.71

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Solution

The fourth proportional to 211,151.71, 291,308.28 and 120,512.71 is: 166,261.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,151.71 : 291,308.28 = 120,512.71 : x
  2. Step 2: Convert to fraction form
    211,151.71/291,308.28 = 120,512.71/x
  3. Step 3: Cross multiply
    211,151.71x = 291,308.28 × 120,512.71
  4. Step 4: Simplify right side
    211,151.71x = 35,106,350,268.24
  5. Step 5: Solve for x
    x = 35,106,350,268.24/211,151.71
  6. Step 6: Final answer
    x = 166,261.26

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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.