Home / 78,211.11-117,333.75-28,286.00

Finding the Fourth Proportional to 78,211.11, 117,333.75 and 28,286.00

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Solution

The fourth proportional to 78,211.11, 117,333.75 and 28,286.00 is: 42,435.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,211.11 : 117,333.75 = 28,286.00 : x
  2. Step 2: Convert to fraction form
    78,211.11/117,333.75 = 28,286.00/x
  3. Step 3: Cross multiply
    78,211.11x = 117,333.75 × 28,286.00
  4. Step 4: Simplify right side
    78,211.11x = 3,318,901,724.40
  5. Step 5: Solve for x
    x = 3,318,901,724.40/78,211.11
  6. Step 6: Final answer
    x = 42,435.17

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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.