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Finding the Fourth Proportional to 84,016.80, 125,879.40 and 54,419.40

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Solution

The fourth proportional to 84,016.80, 125,879.40 and 54,419.40 is: 81,534.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,016.80 : 125,879.40 = 54,419.40 : x
  2. Step 2: Convert to fraction form
    84,016.80/125,879.40 = 54,419.40/x
  3. Step 3: Cross multiply
    84,016.80x = 125,879.40 × 54,419.40
  4. Step 4: Simplify right side
    84,016.80x = 6,850,281,420.36
  5. Step 5: Solve for x
    x = 6,850,281,420.36/84,016.80
  6. Step 6: Final answer
    x = 81,534.66

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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.