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Finding the Fourth Proportional to 255,782.47, 383,703.33 and 85,019.45

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Solution

The fourth proportional to 255,782.47, 383,703.33 and 85,019.45 is: 127,539.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,782.47 : 383,703.33 = 85,019.45 : x
  2. Step 2: Convert to fraction form
    255,782.47/383,703.33 = 85,019.45/x
  3. Step 3: Cross multiply
    255,782.47x = 383,703.33 × 85,019.45
  4. Step 4: Simplify right side
    255,782.47x = 32,622,244,161.25
  5. Step 5: Solve for x
    x = 32,622,244,161.25/255,782.47
  6. Step 6: Final answer
    x = 127,539.02

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1.5x scale

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.