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Finding the Fourth Proportional to 48,465.64, 72,699.90 and 18,890.20

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Solution

The fourth proportional to 48,465.64, 72,699.90 and 18,890.20 is: 28,335.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,465.64 : 72,699.90 = 18,890.20 : x
  2. Step 2: Convert to fraction form
    48,465.64/72,699.90 = 18,890.20/x
  3. Step 3: Cross multiply
    48,465.64x = 72,699.90 × 18,890.20
  4. Step 4: Simplify right side
    48,465.64x = 1,373,315,650.98
  5. Step 5: Solve for x
    x = 1,373,315,650.98/48,465.64
  6. Step 6: Final answer
    x = 28,335.86

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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.