Home / 52,121.50-78,181.34-12,678.95

Finding the Fourth Proportional to 52,121.50, 78,181.34 and 12,678.95

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Solution

The fourth proportional to 52,121.50, 78,181.34 and 12,678.95 is: 19,018.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,121.50 : 78,181.34 = 12,678.95 : x
  2. Step 2: Convert to fraction form
    52,121.50/78,181.34 = 12,678.95/x
  3. Step 3: Cross multiply
    52,121.50x = 78,181.34 × 12,678.95
  4. Step 4: Simplify right side
    52,121.50x = 991,257,432.85
  5. Step 5: Solve for x
    x = 991,257,432.85/52,121.50
  6. Step 6: Final answer
    x = 19,018.21

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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.