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Finding the Fourth Proportional to 211,265.50, 291,546.40 and 121,841.50

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Solution

The fourth proportional to 211,265.50, 291,546.40 and 121,841.50 is: 168,141.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,265.50 : 291,546.40 = 121,841.50 : x
  2. Step 2: Convert to fraction form
    211,265.50/291,546.40 = 121,841.50/x
  3. Step 3: Cross multiply
    211,265.50x = 291,546.40 × 121,841.50
  4. Step 4: Simplify right side
    211,265.50x = 35,522,450,695.60
  5. Step 5: Solve for x
    x = 35,522,450,695.60/211,265.50
  6. Step 6: Final answer
    x = 168,141.28

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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.