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Finding the Fourth Proportional to 116,666.73, 161,012.16 and 71,374.86

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Solution

The fourth proportional to 116,666.73, 161,012.16 and 71,374.86 is: 98,504.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,666.73 : 161,012.16 = 71,374.86 : x
  2. Step 2: Convert to fraction form
    116,666.73/161,012.16 = 71,374.86/x
  3. Step 3: Cross multiply
    116,666.73x = 161,012.16 × 71,374.86
  4. Step 4: Simplify right side
    116,666.73x = 11,492,220,378.30
  5. Step 5: Solve for x
    x = 11,492,220,378.30/116,666.73
  6. Step 6: Final answer
    x = 98,504.69

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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.