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Finding the Fourth Proportional to 255,649.50, 383,530.50 and 75,720.96

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Solution

The fourth proportional to 255,649.50, 383,530.50 and 75,720.96 is: 113,598.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,649.50 : 383,530.50 = 75,720.96 : x
  2. Step 2: Convert to fraction form
    255,649.50/383,530.50 = 75,720.96/x
  3. Step 3: Cross multiply
    255,649.50x = 383,530.50 × 75,720.96
  4. Step 4: Simplify right side
    255,649.50x = 29,041,297,649.28
  5. Step 5: Solve for x
    x = 29,041,297,649.28/255,649.50
  6. Step 6: Final answer
    x = 113,598.10

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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.