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Finding the Fourth Proportional to 120,783.36, 181,174.80 and 79,220.64

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Solution

The fourth proportional to 120,783.36, 181,174.80 and 79,220.64 is: 118,830.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,783.36 : 181,174.80 = 79,220.64 : x
  2. Step 2: Convert to fraction form
    120,783.36/181,174.80 = 79,220.64/x
  3. Step 3: Cross multiply
    120,783.36x = 181,174.80 × 79,220.64
  4. Step 4: Simplify right side
    120,783.36x = 14,352,783,607.87
  5. Step 5: Solve for x
    x = 14,352,783,607.87/120,783.36
  6. Step 6: Final answer
    x = 118,830.80

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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.