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Finding the Fourth Proportional to 74,758.40, 102,956.64 and 73,125.44

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Solution

The fourth proportional to 74,758.40, 102,956.64 and 73,125.44 is: 100,707.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,758.40 : 102,956.64 = 73,125.44 : x
  2. Step 2: Convert to fraction form
    74,758.40/102,956.64 = 73,125.44/x
  3. Step 3: Cross multiply
    74,758.40x = 102,956.64 × 73,125.44
  4. Step 4: Simplify right side
    74,758.40x = 7,528,749,600.92
  5. Step 5: Solve for x
    x = 7,528,749,600.92/74,758.40
  6. Step 6: Final answer
    x = 100,707.74

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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.