Home / 105,479.87-145,563.21-57,734.15

Finding the Fourth Proportional to 105,479.87, 145,563.21 and 57,734.15

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Solution

The fourth proportional to 105,479.87, 145,563.21 and 57,734.15 is: 79,673.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,479.87 : 145,563.21 = 57,734.15 : x
  2. Step 2: Convert to fraction form
    105,479.87/145,563.21 = 57,734.15/x
  3. Step 3: Cross multiply
    105,479.87x = 145,563.21 × 57,734.15
  4. Step 4: Simplify right side
    105,479.87x = 8,403,967,472.81
  5. Step 5: Solve for x
    x = 8,403,967,472.81/105,479.87
  6. Step 6: Final answer
    x = 79,673.67

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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.