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Finding the Fourth Proportional to 56,273.78, 84,368.74 and 18,811.68

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Solution

The fourth proportional to 56,273.78, 84,368.74 and 18,811.68 is: 28,203.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,273.78 : 84,368.74 = 18,811.68 : x
  2. Step 2: Convert to fraction form
    56,273.78/84,368.74 = 18,811.68/x
  3. Step 3: Cross multiply
    56,273.78x = 84,368.74 × 18,811.68
  4. Step 4: Simplify right side
    56,273.78x = 1,587,117,762.40
  5. Step 5: Solve for x
    x = 1,587,117,762.40/56,273.78
  6. Step 6: Final answer
    x = 28,203.51

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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.