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Finding the Fourth Proportional to 85,728.92, 118,310.36 and 47,492.66

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Solution

The fourth proportional to 85,728.92, 118,310.36 and 47,492.66 is: 65,542.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,728.92 : 118,310.36 = 47,492.66 : x
  2. Step 2: Convert to fraction form
    85,728.92/118,310.36 = 47,492.66/x
  3. Step 3: Cross multiply
    85,728.92x = 118,310.36 × 47,492.66
  4. Step 4: Simplify right side
    85,728.92x = 5,618,873,760.27
  5. Step 5: Solve for x
    x = 5,618,873,760.27/85,728.92
  6. Step 6: Final answer
    x = 65,542.34

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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.