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Finding the Fourth Proportional to 90,779, 125,275.02 and 51,035

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Solution

The fourth proportional to 90,779, 125,275.02 and 51,035 is: 70,428.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,779 : 125,275.02 = 51,035 : x
  2. Step 2: Convert to fraction form
    90,779/125,275.02 = 51,035/x
  3. Step 3: Cross multiply
    90,779x = 125,275.02 × 51,035
  4. Step 4: Simplify right side
    90,779x = 6,393,410,645.70
  5. Step 5: Solve for x
    x = 6,393,410,645.70/90,779
  6. Step 6: Final answer
    x = 70,428.30

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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.