Home / 85,080.20-127,639.32-25,920.50

Finding the Fourth Proportional to 85,080.20, 127,639.32 and 25,920.50

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Solution

The fourth proportional to 85,080.20, 127,639.32 and 25,920.50 is: 38,886.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,080.20 : 127,639.32 = 25,920.50 : x
  2. Step 2: Convert to fraction form
    85,080.20/127,639.32 = 25,920.50/x
  3. Step 3: Cross multiply
    85,080.20x = 127,639.32 × 25,920.50
  4. Step 4: Simplify right side
    85,080.20x = 3,308,474,994.06
  5. Step 5: Solve for x
    x = 3,308,474,994.06/85,080.20
  6. Step 6: Final answer
    x = 38,886.54

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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.