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Finding the Fourth Proportional to 213,087.60, 319,631.40 and 134,290.80

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Solution

The fourth proportional to 213,087.60, 319,631.40 and 134,290.80 is: 201,436.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,087.60 : 319,631.40 = 134,290.80 : x
  2. Step 2: Convert to fraction form
    213,087.60/319,631.40 = 134,290.80/x
  3. Step 3: Cross multiply
    213,087.60x = 319,631.40 × 134,290.80
  4. Step 4: Simplify right side
    213,087.60x = 42,923,556,411.12
  5. Step 5: Solve for x
    x = 42,923,556,411.12/213,087.60
  6. Step 6: Final answer
    x = 201,436.20

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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.