Home / 105,479.87-145,561.10-57,080.73

Finding the Fourth Proportional to 105,479.87, 145,561.10 and 57,080.73

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Solution

The fourth proportional to 105,479.87, 145,561.10 and 57,080.73 is: 78,770.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,479.87 : 145,561.10 = 57,080.73 : x
  2. Step 2: Convert to fraction form
    105,479.87/145,561.10 = 57,080.73/x
  3. Step 3: Cross multiply
    105,479.87x = 145,561.10 × 57,080.73
  4. Step 4: Simplify right side
    105,479.87x = 8,308,733,847.60
  5. Step 5: Solve for x
    x = 8,308,733,847.60/105,479.87
  6. Step 6: Final answer
    x = 78,770.80

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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.