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Finding the Fourth Proportional to 127,260.60, 190,890.90 and 80,021.40

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Solution

The fourth proportional to 127,260.60, 190,890.90 and 80,021.40 is: 120,032.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,260.60 : 190,890.90 = 80,021.40 : x
  2. Step 2: Convert to fraction form
    127,260.60/190,890.90 = 80,021.40/x
  3. Step 3: Cross multiply
    127,260.60x = 190,890.90 × 80,021.40
  4. Step 4: Simplify right side
    127,260.60x = 15,275,357,065.26
  5. Step 5: Solve for x
    x = 15,275,357,065.26/127,260.60
  6. Step 6: Final answer
    x = 120,032.10

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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.