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Finding the Fourth Proportional to 87,461.70, 120,573.93 and 73,978.44

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Solution

The fourth proportional to 87,461.70, 120,573.93 and 73,978.44 is: 101,986.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,461.70 : 120,573.93 = 73,978.44 : x
  2. Step 2: Convert to fraction form
    87,461.70/120,573.93 = 73,978.44/x
  3. Step 3: Cross multiply
    87,461.70x = 120,573.93 × 73,978.44
  4. Step 4: Simplify right side
    87,461.70x = 8,919,871,246.07
  5. Step 5: Solve for x
    x = 8,919,871,246.07/87,461.70
  6. Step 6: Final answer
    x = 101,986.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.