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Finding the Fourth Proportional to 90,823, 125,336.28 and 51,079

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Solution

The fourth proportional to 90,823, 125,336.28 and 51,079 is: 70,489.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,823 : 125,336.28 = 51,079 : x
  2. Step 2: Convert to fraction form
    90,823/125,336.28 = 51,079/x
  3. Step 3: Cross multiply
    90,823x = 125,336.28 × 51,079
  4. Step 4: Simplify right side
    90,823x = 6,402,051,846.12
  5. Step 5: Solve for x
    x = 6,402,051,846.12/90,823
  6. Step 6: Final answer
    x = 70,489.32

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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.