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Finding the Fourth Proportional to 127,216.80, 190,825.20 and 71,920.80

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Solution

The fourth proportional to 127,216.80, 190,825.20 and 71,920.80 is: 107,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,216.80 : 190,825.20 = 71,920.80 : x
  2. Step 2: Convert to fraction form
    127,216.80/190,825.20 = 71,920.80/x
  3. Step 3: Cross multiply
    127,216.80x = 190,825.20 × 71,920.80
  4. Step 4: Simplify right side
    127,216.80x = 13,724,301,044.16
  5. Step 5: Solve for x
    x = 13,724,301,044.16/127,216.80
  6. Step 6: Final answer
    x = 107,881.20

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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.