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Finding the Fourth Proportional to 81,649.85, 112,682.36 and 45,355.53

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Solution

The fourth proportional to 81,649.85, 112,682.36 and 45,355.53 is: 62,593.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649.85 : 112,682.36 = 45,355.53 : x
  2. Step 2: Convert to fraction form
    81,649.85/112,682.36 = 45,355.53/x
  3. Step 3: Cross multiply
    81,649.85x = 112,682.36 × 45,355.53
  4. Step 4: Simplify right side
    81,649.85x = 5,110,767,932.67
  5. Step 5: Solve for x
    x = 5,110,767,932.67/81,649.85
  6. Step 6: Final answer
    x = 62,593.72

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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.