Home / 76,439.16-105,489.55-42,447.77

Finding the Fourth Proportional to 76,439.16, 105,489.55 and 42,447.77

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Solution

The fourth proportional to 76,439.16, 105,489.55 and 42,447.77 is: 58,579.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,439.16 : 105,489.55 = 42,447.77 : x
  2. Step 2: Convert to fraction form
    76,439.16/105,489.55 = 42,447.77/x
  3. Step 3: Cross multiply
    76,439.16x = 105,489.55 × 42,447.77
  4. Step 4: Simplify right side
    76,439.16x = 4,477,796,155.80
  5. Step 5: Solve for x
    x = 4,477,796,155.80/76,439.16
  6. Step 6: Final answer
    x = 58,579.87

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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.