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Finding the Fourth Proportional to 74,687.90, 112,029.15 and 30,313.40

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Solution

The fourth proportional to 74,687.90, 112,029.15 and 30,313.40 is: 45,469.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,687.90 : 112,029.15 = 30,313.40 : x
  2. Step 2: Convert to fraction form
    74,687.90/112,029.15 = 30,313.40/x
  3. Step 3: Cross multiply
    74,687.90x = 112,029.15 × 30,313.40
  4. Step 4: Simplify right side
    74,687.90x = 3,395,984,435.61
  5. Step 5: Solve for x
    x = 3,395,984,435.61/74,687.90
  6. Step 6: Final answer
    x = 45,469.00

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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.