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Finding the Fourth Proportional to 69,010.40, 103,515.60 and 45,390.80

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Solution

The fourth proportional to 69,010.40, 103,515.60 and 45,390.80 is: 68,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,010.40 : 103,515.60 = 45,390.80 : x
  2. Step 2: Convert to fraction form
    69,010.40/103,515.60 = 45,390.80/x
  3. Step 3: Cross multiply
    69,010.40x = 103,515.60 × 45,390.80
  4. Step 4: Simplify right side
    69,010.40x = 4,698,655,896.48
  5. Step 5: Solve for x
    x = 4,698,655,896.48/69,010.40
  6. Step 6: Final answer
    x = 68,086.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.