Home / 81,435.24-121,505.40-71,462.52

Finding the Fourth Proportional to 81,435.24, 121,505.40 and 71,462.52

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Solution

The fourth proportional to 81,435.24, 121,505.40 and 71,462.52 is: 106,625.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,435.24 : 121,505.40 = 71,462.52 : x
  2. Step 2: Convert to fraction form
    81,435.24/121,505.40 = 71,462.52/x
  3. Step 3: Cross multiply
    81,435.24x = 121,505.40 × 71,462.52
  4. Step 4: Simplify right side
    81,435.24x = 8,683,082,077.61
  5. Step 5: Solve for x
    x = 8,683,082,077.61/81,435.24
  6. Step 6: Final answer
    x = 106,625.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.