Home / 78,436.22-117,653.29-19,272.40

Finding the Fourth Proportional to 78,436.22, 117,653.29 and 19,272.40

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Solution

The fourth proportional to 78,436.22, 117,653.29 and 19,272.40 is: 28,908.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,436.22 : 117,653.29 = 19,272.40 : x
  2. Step 2: Convert to fraction form
    78,436.22/117,653.29 = 19,272.40/x
  3. Step 3: Cross multiply
    78,436.22x = 117,653.29 × 19,272.40
  4. Step 4: Simplify right side
    78,436.22x = 2,267,460,923.88
  5. Step 5: Solve for x
    x = 2,267,460,923.88/78,436.22
  6. Step 6: Final answer
    x = 28,908.34

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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.