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Finding the Fourth Proportional to 84,877.74, 127,300.20 and 80,662.90

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Solution

The fourth proportional to 84,877.74, 127,300.20 and 80,662.90 is: 120,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,877.74 : 127,300.20 = 80,662.90 : x
  2. Step 2: Convert to fraction form
    84,877.74/127,300.20 = 80,662.90/x
  3. Step 3: Cross multiply
    84,877.74x = 127,300.20 × 80,662.90
  4. Step 4: Simplify right side
    84,877.74x = 10,268,403,302.58
  5. Step 5: Solve for x
    x = 10,268,403,302.58/84,877.74
  6. Step 6: Final answer
    x = 120,978.75

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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.