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Finding the Fourth Proportional to 73,924.50, 102,015.90 and 40,390.50

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Solution

The fourth proportional to 73,924.50, 102,015.90 and 40,390.50 is: 55,738.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,924.50 : 102,015.90 = 40,390.50 : x
  2. Step 2: Convert to fraction form
    73,924.50/102,015.90 = 40,390.50/x
  3. Step 3: Cross multiply
    73,924.50x = 102,015.90 × 40,390.50
  4. Step 4: Simplify right side
    73,924.50x = 4,120,473,208.95
  5. Step 5: Solve for x
    x = 4,120,473,208.95/73,924.50
  6. Step 6: Final answer
    x = 55,738.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.