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Finding the Fourth Proportional to 57,917.20, 87,061.40 and 53,808.40

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Solution

The fourth proportional to 57,917.20, 87,061.40 and 53,808.40 is: 80,885.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,917.20 : 87,061.40 = 53,808.40 : x
  2. Step 2: Convert to fraction form
    57,917.20/87,061.40 = 53,808.40/x
  3. Step 3: Cross multiply
    57,917.20x = 87,061.40 × 53,808.40
  4. Step 4: Simplify right side
    57,917.20x = 4,684,634,635.76
  5. Step 5: Solve for x
    x = 4,684,634,635.76/57,917.20
  6. Step 6: Final answer
    x = 80,885.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.