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Finding the Fourth Proportional to 212,638.40, 319,103.40 and 94,394.60

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Solution

The fourth proportional to 212,638.40, 319,103.40 and 94,394.60 is: 141,656.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,638.40 : 319,103.40 = 94,394.60 : x
  2. Step 2: Convert to fraction form
    212,638.40/319,103.40 = 94,394.60/x
  3. Step 3: Cross multiply
    212,638.40x = 319,103.40 × 94,394.60
  4. Step 4: Simplify right side
    212,638.40x = 30,121,637,801.64
  5. Step 5: Solve for x
    x = 30,121,637,801.64/212,638.40
  6. Step 6: Final answer
    x = 141,656.62

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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.