Home / 81,277.79-111,914.12-71,149.55

Finding the Fourth Proportional to 81,277.79, 111,914.12 and 71,149.55

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Solution

The fourth proportional to 81,277.79, 111,914.12 and 71,149.55 is: 97,968.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,277.79 : 111,914.12 = 71,149.55 : x
  2. Step 2: Convert to fraction form
    81,277.79/111,914.12 = 71,149.55/x
  3. Step 3: Cross multiply
    81,277.79x = 111,914.12 × 71,149.55
  4. Step 4: Simplify right side
    81,277.79x = 7,962,638,894.95
  5. Step 5: Solve for x
    x = 7,962,638,894.95/81,277.79
  6. Step 6: Final answer
    x = 97,968.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.