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Finding the Fourth Proportional to 60,907.80, 91,288.80 and 31,310.40

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Solution

The fourth proportional to 60,907.80, 91,288.80 and 31,310.40 is: 46,928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,907.80 : 91,288.80 = 31,310.40 : x
  2. Step 2: Convert to fraction form
    60,907.80/91,288.80 = 31,310.40/x
  3. Step 3: Cross multiply
    60,907.80x = 91,288.80 × 31,310.40
  4. Step 4: Simplify right side
    60,907.80x = 2,858,288,843.52
  5. Step 5: Solve for x
    x = 2,858,288,843.52/60,907.80
  6. Step 6: Final answer
    x = 46,928.12

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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.