Home / 87,106.40-120,215.76-51,307.68

Finding the Fourth Proportional to 87,106.40, 120,215.76 and 51,307.68

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Solution

The fourth proportional to 87,106.40, 120,215.76 and 51,307.68 is: 70,809.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,106.40 : 120,215.76 = 51,307.68 : x
  2. Step 2: Convert to fraction form
    87,106.40/120,215.76 = 51,307.68/x
  3. Step 3: Cross multiply
    87,106.40x = 120,215.76 × 51,307.68
  4. Step 4: Simplify right side
    87,106.40x = 6,167,991,745.04
  5. Step 5: Solve for x
    x = 6,167,991,745.04/87,106.40
  6. Step 6: Final answer
    x = 70,809.86

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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.