Home / 76,684.14-105,815.70-42,687.36

Finding the Fourth Proportional to 76,684.14, 105,815.70 and 42,687.36

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Solution

The fourth proportional to 76,684.14, 105,815.70 and 42,687.36 is: 58,903.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,684.14 : 105,815.70 = 42,687.36 : x
  2. Step 2: Convert to fraction form
    76,684.14/105,815.70 = 42,687.36/x
  3. Step 3: Cross multiply
    76,684.14x = 105,815.70 × 42,687.36
  4. Step 4: Simplify right side
    76,684.14x = 4,516,992,879.55
  5. Step 5: Solve for x
    x = 4,516,992,879.55/76,684.14
  6. Step 6: Final answer
    x = 58,903.87

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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.