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Finding the Fourth Proportional to 89,978.63, 124,170.50 and 52,255.31

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Solution

The fourth proportional to 89,978.63, 124,170.50 and 52,255.31 is: 72,112.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,978.63 : 124,170.50 = 52,255.31 : x
  2. Step 2: Convert to fraction form
    89,978.63/124,170.50 = 52,255.31/x
  3. Step 3: Cross multiply
    89,978.63x = 124,170.50 × 52,255.31
  4. Step 4: Simplify right side
    89,978.63x = 6,488,567,480.14
  5. Step 5: Solve for x
    x = 6,488,567,480.14/89,978.63
  6. Step 6: Final answer
    x = 72,112.32

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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.