Home / 215,139.60-322,709.40-121,827.60

Finding the Fourth Proportional to 215,139.60, 322,709.40 and 121,827.60

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Solution

The fourth proportional to 215,139.60, 322,709.40 and 121,827.60 is: 182,741.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,139.60 : 322,709.40 = 121,827.60 : x
  2. Step 2: Convert to fraction form
    215,139.60/322,709.40 = 121,827.60/x
  3. Step 3: Cross multiply
    215,139.60x = 322,709.40 × 121,827.60
  4. Step 4: Simplify right side
    215,139.60x = 39,314,911,699.44
  5. Step 5: Solve for x
    x = 39,314,911,699.44/215,139.60
  6. Step 6: Final answer
    x = 182,741.40

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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.