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Finding the Fourth Proportional to 215,085.60, 322,628.40 and 121,773.60

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Solution

The fourth proportional to 215,085.60, 322,628.40 and 121,773.60 is: 182,660.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,085.60 : 322,628.40 = 121,773.60 : x
  2. Step 2: Convert to fraction form
    215,085.60/322,628.40 = 121,773.60/x
  3. Step 3: Cross multiply
    215,085.60x = 322,628.40 × 121,773.60
  4. Step 4: Simplify right side
    215,085.60x = 39,287,621,730.24
  5. Step 5: Solve for x
    x = 39,287,621,730.24/215,085.60
  6. Step 6: Final answer
    x = 182,660.40

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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.