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Finding the Fourth Proportional to 40,903.80, 61,355.70 and 39,919.65

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Solution

The fourth proportional to 40,903.80, 61,355.70 and 39,919.65 is: 59,879.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,903.80 : 61,355.70 = 39,919.65 : x
  2. Step 2: Convert to fraction form
    40,903.80/61,355.70 = 39,919.65/x
  3. Step 3: Cross multiply
    40,903.80x = 61,355.70 × 39,919.65
  4. Step 4: Simplify right side
    40,903.80x = 2,449,298,069.51
  5. Step 5: Solve for x
    x = 2,449,298,069.51/40,903.80
  6. Step 6: Final answer
    x = 59,879.48

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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.