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Finding the Fourth Proportional to 72,783.19, 109,059.36 and 56,183.86

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Solution

The fourth proportional to 72,783.19, 109,059.36 and 56,183.86 is: 84,186.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,783.19 : 109,059.36 = 56,183.86 : x
  2. Step 2: Convert to fraction form
    72,783.19/109,059.36 = 56,183.86/x
  3. Step 3: Cross multiply
    72,783.19x = 109,059.36 × 56,183.86
  4. Step 4: Simplify right side
    72,783.19x = 6,127,375,813.93
  5. Step 5: Solve for x
    x = 6,127,375,813.93/72,783.19
  6. Step 6: Final answer
    x = 84,186.69

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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.