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Finding the Fourth Proportional to 80,368.86, 120,485.25 and 49,138.50

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Solution

The fourth proportional to 80,368.86, 120,485.25 and 49,138.50 is: 73,666.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,368.86 : 120,485.25 = 49,138.50 : x
  2. Step 2: Convert to fraction form
    80,368.86/120,485.25 = 49,138.50/x
  3. Step 3: Cross multiply
    80,368.86x = 120,485.25 × 49,138.50
  4. Step 4: Simplify right side
    80,368.86x = 5,920,464,457.13
  5. Step 5: Solve for x
    x = 5,920,464,457.13/80,368.86
  6. Step 6: Final answer
    x = 73,666.15

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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.