Home / 85,333.20-127,999.80-54,203.60

Finding the Fourth Proportional to 85,333.20, 127,999.80 and 54,203.60

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Solution

The fourth proportional to 85,333.20, 127,999.80 and 54,203.60 is: 81,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,333.20 : 127,999.80 = 54,203.60 : x
  2. Step 2: Convert to fraction form
    85,333.20/127,999.80 = 54,203.60/x
  3. Step 3: Cross multiply
    85,333.20x = 127,999.80 × 54,203.60
  4. Step 4: Simplify right side
    85,333.20x = 6,938,049,959.28
  5. Step 5: Solve for x
    x = 6,938,049,959.28/85,333.20
  6. Step 6: Final answer
    x = 81,305.40

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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.