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Finding the Fourth Proportional to 74,969.76, 103,543.28 and 51,054.88

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Solution

The fourth proportional to 74,969.76, 103,543.28 and 51,054.88 is: 70,513.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,969.76 : 103,543.28 = 51,054.88 : x
  2. Step 2: Convert to fraction form
    74,969.76/103,543.28 = 51,054.88/x
  3. Step 3: Cross multiply
    74,969.76x = 103,543.28 × 51,054.88
  4. Step 4: Simplify right side
    74,969.76x = 5,286,389,735.21
  5. Step 5: Solve for x
    x = 5,286,389,735.21/74,969.76
  6. Step 6: Final answer
    x = 70,513.63

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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.