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Finding the Fourth Proportional to 211,260.50, 291,539.50 and 121,836.50

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Solution

The fourth proportional to 211,260.50, 291,539.50 and 121,836.50 is: 168,134.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,260.50 : 291,539.50 = 121,836.50 : x
  2. Step 2: Convert to fraction form
    211,260.50/291,539.50 = 121,836.50/x
  3. Step 3: Cross multiply
    211,260.50x = 291,539.50 × 121,836.50
  4. Step 4: Simplify right side
    211,260.50x = 35,520,152,291.75
  5. Step 5: Solve for x
    x = 35,520,152,291.75/211,260.50
  6. Step 6: Final answer
    x = 168,134.38

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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.