Home / 51,128.70-76,282.37-45,515.40

Finding the Fourth Proportional to 51,128.70, 76,282.37 and 45,515.40

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Solution

The fourth proportional to 51,128.70, 76,282.37 and 45,515.40 is: 67,907.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,128.70 : 76,282.37 = 45,515.40 : x
  2. Step 2: Convert to fraction form
    51,128.70/76,282.37 = 45,515.40/x
  3. Step 3: Cross multiply
    51,128.70x = 76,282.37 × 45,515.40
  4. Step 4: Simplify right side
    51,128.70x = 3,472,022,355.92
  5. Step 5: Solve for x
    x = 3,472,022,355.92/51,128.70
  6. Step 6: Final answer
    x = 67,907.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.