Home / 287,360.78-431,093.45-118,789.55

Finding the Fourth Proportional to 287,360.78, 431,093.45 and 118,789.55

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Solution

The fourth proportional to 287,360.78, 431,093.45 and 118,789.55 is: 178,205.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,360.78 : 431,093.45 = 118,789.55 : x
  2. Step 2: Convert to fraction form
    287,360.78/431,093.45 = 118,789.55/x
  3. Step 3: Cross multiply
    287,360.78x = 431,093.45 × 118,789.55
  4. Step 4: Simplify right side
    287,360.78x = 51,209,394,184.03
  5. Step 5: Solve for x
    x = 51,209,394,184.03/287,360.78
  6. Step 6: Final answer
    x = 178,205.93

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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.