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Finding the Fourth Proportional to 74,685.72, 112,026.33 and 30,311.40

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Solution

The fourth proportional to 74,685.72, 112,026.33 and 30,311.40 is: 45,466.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,685.72 : 112,026.33 = 30,311.40 : x
  2. Step 2: Convert to fraction form
    74,685.72/112,026.33 = 30,311.40/x
  3. Step 3: Cross multiply
    74,685.72x = 112,026.33 × 30,311.40
  4. Step 4: Simplify right side
    74,685.72x = 3,395,674,899.16
  5. Step 5: Solve for x
    x = 3,395,674,899.16/74,685.72
  6. Step 6: Final answer
    x = 45,466.19

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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.