Home / 81,701.21-112,734.45-51,070.72

Finding the Fourth Proportional to 81,701.21, 112,734.45 and 51,070.72

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Solution

The fourth proportional to 81,701.21, 112,734.45 and 51,070.72 is: 70,469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,701.21 : 112,734.45 = 51,070.72 : x
  2. Step 2: Convert to fraction form
    81,701.21/112,734.45 = 51,070.72/x
  3. Step 3: Cross multiply
    81,701.21x = 112,734.45 × 51,070.72
  4. Step 4: Simplify right side
    81,701.21x = 5,757,429,530.30
  5. Step 5: Solve for x
    x = 5,757,429,530.30/81,701.21
  6. Step 6: Final answer
    x = 70,469.33

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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.