Home / 78,293.03-117,438.98-19,128.15

Finding the Fourth Proportional to 78,293.03, 117,438.98 and 19,128.15

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Solution

The fourth proportional to 78,293.03, 117,438.98 and 19,128.15 is: 28,692.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,293.03 : 117,438.98 = 19,128.15 : x
  2. Step 2: Convert to fraction form
    78,293.03/117,438.98 = 19,128.15/x
  3. Step 3: Cross multiply
    78,293.03x = 117,438.98 × 19,128.15
  4. Step 4: Simplify right side
    78,293.03x = 2,246,390,329.65
  5. Step 5: Solve for x
    x = 2,246,390,329.65/78,293.03
  6. Step 6: Final answer
    x = 28,692.09

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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.