Home / 78,203.20-117,305.04-19,038.88

Finding the Fourth Proportional to 78,203.20, 117,305.04 and 19,038.88

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Solution

The fourth proportional to 78,203.20, 117,305.04 and 19,038.88 is: 28,558.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,203.20 : 117,305.04 = 19,038.88 : x
  2. Step 2: Convert to fraction form
    78,203.20/117,305.04 = 19,038.88/x
  3. Step 3: Cross multiply
    78,203.20x = 117,305.04 × 19,038.88
  4. Step 4: Simplify right side
    78,203.20x = 2,233,356,579.96
  5. Step 5: Solve for x
    x = 2,233,356,579.96/78,203.20
  6. Step 6: Final answer
    x = 28,558.38

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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.