Home / 76,439.21-105,482.58-42,449.86

Finding the Fourth Proportional to 76,439.21, 105,482.58 and 42,449.86

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Solution

The fourth proportional to 76,439.21, 105,482.58 and 42,449.86 is: 58,578.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,439.21 : 105,482.58 = 42,449.86 : x
  2. Step 2: Convert to fraction form
    76,439.21/105,482.58 = 42,449.86/x
  3. Step 3: Cross multiply
    76,439.21x = 105,482.58 × 42,449.86
  4. Step 4: Simplify right side
    76,439.21x = 4,477,720,226.03
  5. Step 5: Solve for x
    x = 4,477,720,226.03/76,439.21
  6. Step 6: Final answer
    x = 58,578.84

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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.