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Finding the Fourth Proportional to 71,480.94, 98,655.53 and 39,660.09

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Solution

The fourth proportional to 71,480.94, 98,655.53 and 39,660.09 is: 54,737.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,480.94 : 98,655.53 = 39,660.09 : x
  2. Step 2: Convert to fraction form
    71,480.94/98,655.53 = 39,660.09/x
  3. Step 3: Cross multiply
    71,480.94x = 98,655.53 × 39,660.09
  4. Step 4: Simplify right side
    71,480.94x = 3,912,687,000.50
  5. Step 5: Solve for x
    x = 3,912,687,000.50/71,480.94
  6. Step 6: Final answer
    x = 54,737.49

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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.