Home / 52,121.71-78,181.82-12,678.89

Finding the Fourth Proportional to 52,121.71, 78,181.82 and 12,678.89

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Solution

The fourth proportional to 52,121.71, 78,181.82 and 12,678.89 is: 19,018.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,121.71 : 78,181.82 = 12,678.89 : x
  2. Step 2: Convert to fraction form
    52,121.71/78,181.82 = 12,678.89/x
  3. Step 3: Cross multiply
    52,121.71x = 78,181.82 × 12,678.89
  4. Step 4: Simplify right side
    52,121.71x = 991,258,632.39
  5. Step 5: Solve for x
    x = 991,258,632.39/52,121.71
  6. Step 6: Final answer
    x = 19,018.15

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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.