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Finding the Fourth Proportional to 56,978.20, 85,484.56 and 40,370.36

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Solution

The fourth proportional to 56,978.20, 85,484.56 and 40,370.36 is: 60,567.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,978.20 : 85,484.56 = 40,370.36 : x
  2. Step 2: Convert to fraction form
    56,978.20/85,484.56 = 40,370.36/x
  3. Step 3: Cross multiply
    56,978.20x = 85,484.56 × 40,370.36
  4. Step 4: Simplify right side
    56,978.20x = 3,451,042,461.64
  5. Step 5: Solve for x
    x = 3,451,042,461.64/56,978.20
  6. Step 6: Final answer
    x = 60,567.77

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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.