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Finding the Fourth Proportional to 72,375.59, 108,559.91 and 19,785.20

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Solution

The fourth proportional to 72,375.59, 108,559.91 and 19,785.20 is: 29,676.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,375.59 : 108,559.91 = 19,785.20 : x
  2. Step 2: Convert to fraction form
    72,375.59/108,559.91 = 19,785.20/x
  3. Step 3: Cross multiply
    72,375.59x = 108,559.91 × 19,785.20
  4. Step 4: Simplify right side
    72,375.59x = 2,147,879,038.00
  5. Step 5: Solve for x
    x = 2,147,879,038.00/72,375.59
  6. Step 6: Final answer
    x = 29,676.84

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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.