Home / 90,657.02-135,870.42-51,236.30

Finding the Fourth Proportional to 90,657.02, 135,870.42 and 51,236.30

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Solution

The fourth proportional to 90,657.02, 135,870.42 and 51,236.30 is: 76,789.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,657.02 : 135,870.42 = 51,236.30 : x
  2. Step 2: Convert to fraction form
    90,657.02/135,870.42 = 51,236.30/x
  3. Step 3: Cross multiply
    90,657.02x = 135,870.42 × 51,236.30
  4. Step 4: Simplify right side
    90,657.02x = 6,961,497,600.25
  5. Step 5: Solve for x
    x = 6,961,497,600.25/90,657.02
  6. Step 6: Final answer
    x = 76,789.39

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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.