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Finding the Fourth Proportional to 211,173, 291,415.14 and 115,679.40

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Solution

The fourth proportional to 211,173, 291,415.14 and 115,679.40 is: 159,635.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,173 : 291,415.14 = 115,679.40 : x
  2. Step 2: Convert to fraction form
    211,173/291,415.14 = 115,679.40/x
  3. Step 3: Cross multiply
    211,173x = 291,415.14 × 115,679.40
  4. Step 4: Simplify right side
    211,173x = 33,710,728,546.12
  5. Step 5: Solve for x
    x = 33,710,728,546.12/211,173
  6. Step 6: Final answer
    x = 159,635.60

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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.