Home / 78,290.36-117,435.06-19,126.34

Finding the Fourth Proportional to 78,290.36, 117,435.06 and 19,126.34

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Solution

The fourth proportional to 78,290.36, 117,435.06 and 19,126.34 is: 28,689.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,290.36 : 117,435.06 = 19,126.34 : x
  2. Step 2: Convert to fraction form
    78,290.36/117,435.06 = 19,126.34/x
  3. Step 3: Cross multiply
    78,290.36x = 117,435.06 × 19,126.34
  4. Step 4: Simplify right side
    78,290.36x = 2,246,102,885.48
  5. Step 5: Solve for x
    x = 2,246,102,885.48/78,290.36
  6. Step 6: Final answer
    x = 28,689.39

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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.