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Finding the Fourth Proportional to 52,321.80, 78,483.87 and 12,879.30

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Solution

The fourth proportional to 52,321.80, 78,483.87 and 12,879.30 is: 19,319.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,321.80 : 78,483.87 = 12,879.30 : x
  2. Step 2: Convert to fraction form
    52,321.80/78,483.87 = 12,879.30/x
  3. Step 3: Cross multiply
    52,321.80x = 78,483.87 × 12,879.30
  4. Step 4: Simplify right side
    52,321.80x = 1,010,817,306.89
  5. Step 5: Solve for x
    x = 1,010,817,306.89/52,321.80
  6. Step 6: Final answer
    x = 19,319.24

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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.