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Finding the Fourth Proportional to 70,928.93, 106,397.06 and 18,338.87

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Solution

The fourth proportional to 70,928.93, 106,397.06 and 18,338.87 is: 27,509.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,928.93 : 106,397.06 = 18,338.87 : x
  2. Step 2: Convert to fraction form
    70,928.93/106,397.06 = 18,338.87/x
  3. Step 3: Cross multiply
    70,928.93x = 106,397.06 × 18,338.87
  4. Step 4: Simplify right side
    70,928.93x = 1,951,202,026.02
  5. Step 5: Solve for x
    x = 1,951,202,026.02/70,928.93
  6. Step 6: Final answer
    x = 27,509.25

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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.