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Finding the Fourth Proportional to 86,038.48, 128,850.04 and 51,745.64

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Solution

The fourth proportional to 86,038.48, 128,850.04 and 51,745.64 is: 77,493.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,038.48 : 128,850.04 = 51,745.64 : x
  2. Step 2: Convert to fraction form
    86,038.48/128,850.04 = 51,745.64/x
  3. Step 3: Cross multiply
    86,038.48x = 128,850.04 × 51,745.64
  4. Step 4: Simplify right side
    86,038.48x = 6,667,427,783.83
  5. Step 5: Solve for x
    x = 6,667,427,783.83/86,038.48
  6. Step 6: Final answer
    x = 77,493.56

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1.5x scale

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.