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Finding the Fourth Proportional to 87,189.92, 130,846.98 and 39,811.40

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Solution

The fourth proportional to 87,189.92, 130,846.98 and 39,811.40 is: 59,745.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,189.92 : 130,846.98 = 39,811.40 : x
  2. Step 2: Convert to fraction form
    87,189.92/130,846.98 = 39,811.40/x
  3. Step 3: Cross multiply
    87,189.92x = 130,846.98 × 39,811.40
  4. Step 4: Simplify right side
    87,189.92x = 5,209,201,459.57
  5. Step 5: Solve for x
    x = 5,209,201,459.57/87,189.92
  6. Step 6: Final answer
    x = 59,745.46

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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.