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Finding the Fourth Proportional to 85,303.70, 127,955.55 and 65,620.70

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Solution

The fourth proportional to 85,303.70, 127,955.55 and 65,620.70 is: 98,431.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,303.70 : 127,955.55 = 65,620.70 : x
  2. Step 2: Convert to fraction form
    85,303.70/127,955.55 = 65,620.70/x
  3. Step 3: Cross multiply
    85,303.70x = 127,955.55 × 65,620.70
  4. Step 4: Simplify right side
    85,303.70x = 8,396,532,759.89
  5. Step 5: Solve for x
    x = 8,396,532,759.89/85,303.70
  6. Step 6: Final answer
    x = 98,431.05

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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.