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Finding the Fourth Proportional to 85,127.80, 127,764.60 and 37,815.70

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Solution

The fourth proportional to 85,127.80, 127,764.60 and 37,815.70 is: 56,755.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,127.80 : 127,764.60 = 37,815.70 : x
  2. Step 2: Convert to fraction form
    85,127.80/127,764.60 = 37,815.70/x
  3. Step 3: Cross multiply
    85,127.80x = 127,764.60 × 37,815.70
  4. Step 4: Simplify right side
    85,127.80x = 4,831,507,784.22
  5. Step 5: Solve for x
    x = 4,831,507,784.22/85,127.80
  6. Step 6: Final answer
    x = 56,755.93

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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.