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Finding the Fourth Proportional to 85,848.28, 128,753.64 and 43,683.64

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Solution

The fourth proportional to 85,848.28, 128,753.64 and 43,683.64 is: 65,515.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,848.28 : 128,753.64 = 43,683.64 : x
  2. Step 2: Convert to fraction form
    85,848.28/128,753.64 = 43,683.64/x
  3. Step 3: Cross multiply
    85,848.28x = 128,753.64 × 43,683.64
  4. Step 4: Simplify right side
    85,848.28x = 5,624,427,658.45
  5. Step 5: Solve for x
    x = 5,624,427,658.45/85,848.28
  6. Step 6: Final answer
    x = 65,515.90

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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.