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Finding the Fourth Proportional to 84,980.64, 127,453.68 and 80,765.40

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Solution

The fourth proportional to 84,980.64, 127,453.68 and 80,765.40 is: 121,131.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,980.64 : 127,453.68 = 80,765.40 : x
  2. Step 2: Convert to fraction form
    84,980.64/127,453.68 = 80,765.40/x
  3. Step 3: Cross multiply
    84,980.64x = 127,453.68 × 80,765.40
  4. Step 4: Simplify right side
    84,980.64x = 10,293,847,446.67
  5. Step 5: Solve for x
    x = 10,293,847,446.67/84,980.64
  6. Step 6: Final answer
    x = 121,131.68

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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.