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Finding the Fourth Proportional to 56,877.66, 78,484.95 and 40,081.50

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Solution

The fourth proportional to 56,877.66, 78,484.95 and 40,081.50 is: 55,308.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,877.66 : 78,484.95 = 40,081.50 : x
  2. Step 2: Convert to fraction form
    56,877.66/78,484.95 = 40,081.50/x
  3. Step 3: Cross multiply
    56,877.66x = 78,484.95 × 40,081.50
  4. Step 4: Simplify right side
    56,877.66x = 3,145,794,523.43
  5. Step 5: Solve for x
    x = 3,145,794,523.43/56,877.66
  6. Step 6: Final answer
    x = 55,308.09

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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.