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Finding the Fourth Proportional to 83,978.41, 125,671.64 and 52,403.34

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Solution

The fourth proportional to 83,978.41, 125,671.64 and 52,403.34 is: 78,420.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,978.41 : 125,671.64 = 52,403.34 : x
  2. Step 2: Convert to fraction form
    83,978.41/125,671.64 = 52,403.34/x
  3. Step 3: Cross multiply
    83,978.41x = 125,671.64 × 52,403.34
  4. Step 4: Simplify right side
    83,978.41x = 6,585,613,679.28
  5. Step 5: Solve for x
    x = 6,585,613,679.28/83,978.41
  6. Step 6: Final answer
    x = 78,420.32

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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.