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Finding the Fourth Proportional to 74,990.88, 112,486.32 and 30,032.46

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Solution

The fourth proportional to 74,990.88, 112,486.32 and 30,032.46 is: 45,048.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,990.88 : 112,486.32 = 30,032.46 : x
  2. Step 2: Convert to fraction form
    74,990.88/112,486.32 = 30,032.46/x
  3. Step 3: Cross multiply
    74,990.88x = 112,486.32 × 30,032.46
  4. Step 4: Simplify right side
    74,990.88x = 3,378,240,905.95
  5. Step 5: Solve for x
    x = 3,378,240,905.95/74,990.88
  6. Step 6: Final answer
    x = 45,048.69

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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.