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Finding the Fourth Proportional to 116,892.90, 161,370.86 and 76,668.30

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Solution

The fourth proportional to 116,892.90, 161,370.86 and 76,668.30 is: 105,840.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,892.90 : 161,370.86 = 76,668.30 : x
  2. Step 2: Convert to fraction form
    116,892.90/161,370.86 = 76,668.30/x
  3. Step 3: Cross multiply
    116,892.90x = 161,370.86 × 76,668.30
  4. Step 4: Simplify right side
    116,892.90x = 12,372,029,505.74
  5. Step 5: Solve for x
    x = 12,372,029,505.74/116,892.90
  6. Step 6: Final answer
    x = 105,840.73

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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.