Home / 52,121.32-78,181.98-12,678.46

Finding the Fourth Proportional to 52,121.32, 78,181.98 and 12,678.46

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Solution

The fourth proportional to 52,121.32, 78,181.98 and 12,678.46 is: 19,017.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,121.32 : 78,181.98 = 12,678.46 : x
  2. Step 2: Convert to fraction form
    52,121.32/78,181.98 = 12,678.46/x
  3. Step 3: Cross multiply
    52,121.32x = 78,181.98 × 12,678.46
  4. Step 4: Simplify right side
    52,121.32x = 991,227,106.15
  5. Step 5: Solve for x
    x = 991,227,106.15/52,121.32
  6. Step 6: Final answer
    x = 19,017.69

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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.