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Finding the Fourth Proportional to 70,573.20, 105,825.78 and 40,999.50

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Solution

The fourth proportional to 70,573.20, 105,825.78 and 40,999.50 is: 61,479.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,573.20 : 105,825.78 = 40,999.50 : x
  2. Step 2: Convert to fraction form
    70,573.20/105,825.78 = 40,999.50/x
  3. Step 3: Cross multiply
    70,573.20x = 105,825.78 × 40,999.50
  4. Step 4: Simplify right side
    70,573.20x = 4,338,804,067.11
  5. Step 5: Solve for x
    x = 4,338,804,067.11/70,573.20
  6. Step 6: Final answer
    x = 61,479.49

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1.5x scale

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.