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Finding the Fourth Proportional to 74,980.67, 112,415.43 and 45,391.52

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Solution

The fourth proportional to 74,980.67, 112,415.43 and 45,391.52 is: 68,053.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,980.67 : 112,415.43 = 45,391.52 : x
  2. Step 2: Convert to fraction form
    74,980.67/112,415.43 = 45,391.52/x
  3. Step 3: Cross multiply
    74,980.67x = 112,415.43 × 45,391.52
  4. Step 4: Simplify right side
    74,980.67x = 5,102,707,239.15
  5. Step 5: Solve for x
    x = 5,102,707,239.15/74,980.67
  6. Step 6: Final answer
    x = 68,053.64

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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.