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Finding the Fourth Proportional to 74,992.45, 112,362.31 and 45,319.72

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Solution

The fourth proportional to 74,992.45, 112,362.31 and 45,319.72 is: 67,903.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,992.45 : 112,362.31 = 45,319.72 : x
  2. Step 2: Convert to fraction form
    74,992.45/112,362.31 = 45,319.72/x
  3. Step 3: Cross multiply
    74,992.45x = 112,362.31 × 45,319.72
  4. Step 4: Simplify right side
    74,992.45x = 5,092,228,427.75
  5. Step 5: Solve for x
    x = 5,092,228,427.75/74,992.45
  6. Step 6: Final answer
    x = 67,903.21

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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.