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Finding the Fourth Proportional to 71,492.88, 98,660.30 and 39,661.79

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Solution

The fourth proportional to 71,492.88, 98,660.30 and 39,661.79 is: 54,733.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,492.88 : 98,660.30 = 39,661.79 : x
  2. Step 2: Convert to fraction form
    71,492.88/98,660.30 = 39,661.79/x
  3. Step 3: Cross multiply
    71,492.88x = 98,660.30 × 39,661.79
  4. Step 4: Simplify right side
    71,492.88x = 3,913,043,408.33
  5. Step 5: Solve for x
    x = 3,913,043,408.33/71,492.88
  6. Step 6: Final answer
    x = 54,733.33

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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.