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Finding the Fourth Proportional to 81,166.90, 121,531.65 and 63,670.90

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Solution

The fourth proportional to 81,166.90, 121,531.65 and 63,670.90 is: 95,334.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,166.90 : 121,531.65 = 63,670.90 : x
  2. Step 2: Convert to fraction form
    81,166.90/121,531.65 = 63,670.90/x
  3. Step 3: Cross multiply
    81,166.90x = 121,531.65 × 63,670.90
  4. Step 4: Simplify right side
    81,166.90x = 7,738,029,533.99
  5. Step 5: Solve for x
    x = 7,738,029,533.99/81,166.90
  6. Step 6: Final answer
    x = 95,334.79

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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.