Home / 76,439.57-105,483.03-42,450.21

Finding the Fourth Proportional to 76,439.57, 105,483.03 and 42,450.21

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Solution

The fourth proportional to 76,439.57, 105,483.03 and 42,450.21 is: 58,579.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,439.57 : 105,483.03 = 42,450.21 : x
  2. Step 2: Convert to fraction form
    76,439.57/105,483.03 = 42,450.21/x
  3. Step 3: Cross multiply
    76,439.57x = 105,483.03 × 42,450.21
  4. Step 4: Simplify right side
    76,439.57x = 4,477,776,774.94
  5. Step 5: Solve for x
    x = 4,477,776,774.94/76,439.57
  6. Step 6: Final answer
    x = 58,579.31

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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.