Home / 81,317.17-112,138.96-63,405.64

Finding the Fourth Proportional to 81,317.17, 112,138.96 and 63,405.64

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Solution

The fourth proportional to 81,317.17, 112,138.96 and 63,405.64 is: 87,438.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,317.17 : 112,138.96 = 63,405.64 : x
  2. Step 2: Convert to fraction form
    81,317.17/112,138.96 = 63,405.64/x
  3. Step 3: Cross multiply
    81,317.17x = 112,138.96 × 63,405.64
  4. Step 4: Simplify right side
    81,317.17x = 7,110,241,819.17
  5. Step 5: Solve for x
    x = 7,110,241,819.17/81,317.17
  6. Step 6: Final answer
    x = 87,438.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.