Home / 76,439.05-105,482.33-42,449.71

Finding the Fourth Proportional to 76,439.05, 105,482.33 and 42,449.71

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Solution

The fourth proportional to 76,439.05, 105,482.33 and 42,449.71 is: 58,578.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,439.05 : 105,482.33 = 42,449.71 : x
  2. Step 2: Convert to fraction form
    76,439.05/105,482.33 = 42,449.71/x
  3. Step 3: Cross multiply
    76,439.05x = 105,482.33 × 42,449.71
  4. Step 4: Simplify right side
    76,439.05x = 4,477,694,318.62
  5. Step 5: Solve for x
    x = 4,477,694,318.62/76,439.05
  6. Step 6: Final answer
    x = 58,578.62

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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.