Home / 78,270.84-117,407.34-19,107.90

Finding the Fourth Proportional to 78,270.84, 117,407.34 and 19,107.90

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Solution

The fourth proportional to 78,270.84, 117,407.34 and 19,107.90 is: 28,662.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,270.84 : 117,407.34 = 19,107.90 : x
  2. Step 2: Convert to fraction form
    78,270.84/117,407.34 = 19,107.90/x
  3. Step 3: Cross multiply
    78,270.84x = 117,407.34 × 19,107.90
  4. Step 4: Simplify right side
    78,270.84x = 2,243,407,711.99
  5. Step 5: Solve for x
    x = 2,243,407,711.99/78,270.84
  6. Step 6: Final answer
    x = 28,662.11

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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.