Home / 81,720.11-112,773.06-45,909.35

Finding the Fourth Proportional to 81,720.11, 112,773.06 and 45,909.35

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Solution

The fourth proportional to 81,720.11, 112,773.06 and 45,909.35 is: 63,354.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.11 : 112,773.06 = 45,909.35 : x
  2. Step 2: Convert to fraction form
    81,720.11/112,773.06 = 45,909.35/x
  3. Step 3: Cross multiply
    81,720.11x = 112,773.06 × 45,909.35
  4. Step 4: Simplify right side
    81,720.11x = 5,177,337,318.25
  5. Step 5: Solve for x
    x = 5,177,337,318.25/81,720.11
  6. Step 6: Final answer
    x = 63,354.51

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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.