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Finding the Fourth Proportional to 56,781.85, 85,178.04 and 19,329.34

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Solution

The fourth proportional to 56,781.85, 85,178.04 and 19,329.34 is: 28,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,781.85 : 85,178.04 = 19,329.34 : x
  2. Step 2: Convert to fraction form
    56,781.85/85,178.04 = 19,329.34/x
  3. Step 3: Cross multiply
    56,781.85x = 85,178.04 × 19,329.34
  4. Step 4: Simplify right side
    56,781.85x = 1,646,435,295.69
  5. Step 5: Solve for x
    x = 1,646,435,295.69/56,781.85
  6. Step 6: Final answer
    x = 28,995.80

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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.