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Finding the Fourth Proportional to 85,480.80, 128,193.84 and 28,542.48

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Solution

The fourth proportional to 85,480.80, 128,193.84 and 28,542.48 is: 42,804.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,480.80 : 128,193.84 = 28,542.48 : x
  2. Step 2: Convert to fraction form
    85,480.80/128,193.84 = 28,542.48/x
  3. Step 3: Cross multiply
    85,480.80x = 128,193.84 × 28,542.48
  4. Step 4: Simplify right side
    85,480.80x = 3,658,970,114.32
  5. Step 5: Solve for x
    x = 3,658,970,114.32/85,480.80
  6. Step 6: Final answer
    x = 42,804.58

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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.