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Finding the Fourth Proportional to 74,688.64, 103,120.96 and 52,293.76

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Solution

The fourth proportional to 74,688.64, 103,120.96 and 52,293.76 is: 72,200.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,688.64 : 103,120.96 = 52,293.76 : x
  2. Step 2: Convert to fraction form
    74,688.64/103,120.96 = 52,293.76/x
  3. Step 3: Cross multiply
    74,688.64x = 103,120.96 × 52,293.76
  4. Step 4: Simplify right side
    74,688.64x = 5,392,582,733.21
  5. Step 5: Solve for x
    x = 5,392,582,733.21/74,688.64
  6. Step 6: Final answer
    x = 72,200.84

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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.