Home / 81,083.42-121,680.50-28,492.91

Finding the Fourth Proportional to 81,083.42, 121,680.50 and 28,492.91

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Solution

The fourth proportional to 81,083.42, 121,680.50 and 28,492.91 is: 42,758.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,083.42 : 121,680.50 = 28,492.91 : x
  2. Step 2: Convert to fraction form
    81,083.42/121,680.50 = 28,492.91/x
  3. Step 3: Cross multiply
    81,083.42x = 121,680.50 × 28,492.91
  4. Step 4: Simplify right side
    81,083.42x = 3,467,031,535.26
  5. Step 5: Solve for x
    x = 3,467,031,535.26/81,083.42
  6. Step 6: Final answer
    x = 42,758.82

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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.