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Finding the Fourth Proportional to 57,992.80, 81,423.20 and 57,992.80

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Solution

The fourth proportional to 57,992.80, 81,423.20 and 57,992.80 is: 81,423.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,992.80 : 81,423.20 = 57,992.80 : x
  2. Step 2: Convert to fraction form
    57,992.80/81,423.20 = 57,992.80/x
  3. Step 3: Cross multiply
    57,992.80x = 81,423.20 × 57,992.80
  4. Step 4: Simplify right side
    57,992.80x = 4,721,959,352.96
  5. Step 5: Solve for x
    x = 4,721,959,352.96/57,992.80
  6. Step 6: Final answer
    x = 81,423.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.