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Finding the Fourth Proportional to 48,985.60, 73,401.60 and 42,380.80

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Solution

The fourth proportional to 48,985.60, 73,401.60 and 42,380.80 is: 63,504.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,985.60 : 73,401.60 = 42,380.80 : x
  2. Step 2: Convert to fraction form
    48,985.60/73,401.60 = 42,380.80/x
  3. Step 3: Cross multiply
    48,985.60x = 73,401.60 × 42,380.80
  4. Step 4: Simplify right side
    48,985.60x = 3,110,818,529.28
  5. Step 5: Solve for x
    x = 3,110,818,529.28/48,985.60
  6. Step 6: Final answer
    x = 63,504.76

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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.