Home / 87,189.69-120,325.73-51,381.21

Finding the Fourth Proportional to 87,189.69, 120,325.73 and 51,381.21

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Solution

The fourth proportional to 87,189.69, 120,325.73 and 51,381.21 is: 70,908.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,189.69 : 120,325.73 = 51,381.21 : x
  2. Step 2: Convert to fraction form
    87,189.69/120,325.73 = 51,381.21/x
  3. Step 3: Cross multiply
    87,189.69x = 120,325.73 × 51,381.21
  4. Step 4: Simplify right side
    87,189.69x = 6,182,481,344.63
  5. Step 5: Solve for x
    x = 6,182,481,344.63/87,189.69
  6. Step 6: Final answer
    x = 70,908.40

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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.