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Finding the Fourth Proportional to 72,525, 108,792.36 and 19,939.80

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Solution

The fourth proportional to 72,525, 108,792.36 and 19,939.80 is: 29,911.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,525 : 108,792.36 = 19,939.80 : x
  2. Step 2: Convert to fraction form
    72,525/108,792.36 = 19,939.80/x
  3. Step 3: Cross multiply
    72,525x = 108,792.36 × 19,939.80
  4. Step 4: Simplify right side
    72,525x = 2,169,297,899.93
  5. Step 5: Solve for x
    x = 2,169,297,899.93/72,525
  6. Step 6: Final answer
    x = 29,911.04

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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.