Home / 81,421.65-122,153.13-34,028.55

Finding the Fourth Proportional to 81,421.65, 122,153.13 and 34,028.55

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Solution

The fourth proportional to 81,421.65, 122,153.13 and 34,028.55 is: 51,051.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,421.65 : 122,153.13 = 34,028.55 : x
  2. Step 2: Convert to fraction form
    81,421.65/122,153.13 = 34,028.55/x
  3. Step 3: Cross multiply
    81,421.65x = 122,153.13 × 34,028.55
  4. Step 4: Simplify right side
    81,421.65x = 4,156,693,891.86
  5. Step 5: Solve for x
    x = 4,156,693,891.86/81,421.65
  6. Step 6: Final answer
    x = 51,051.46

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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.