Home / 127,839.60-191,759.40-72,543.60

Finding the Fourth Proportional to 127,839.60, 191,759.40 and 72,543.60

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Solution

The fourth proportional to 127,839.60, 191,759.40 and 72,543.60 is: 108,815.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,839.60 : 191,759.40 = 72,543.60 : x
  2. Step 2: Convert to fraction form
    127,839.60/191,759.40 = 72,543.60/x
  3. Step 3: Cross multiply
    127,839.60x = 191,759.40 × 72,543.60
  4. Step 4: Simplify right side
    127,839.60x = 13,910,917,209.84
  5. Step 5: Solve for x
    x = 13,910,917,209.84/127,839.60
  6. Step 6: Final answer
    x = 108,815.40

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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.