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Finding the Fourth Proportional to 116,712, 161,069.76 and 66,410.88

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Solution

The fourth proportional to 116,712, 161,069.76 and 66,410.88 is: 91,651.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,712 : 161,069.76 = 66,410.88 : x
  2. Step 2: Convert to fraction form
    116,712/161,069.76 = 66,410.88/x
  3. Step 3: Cross multiply
    116,712x = 161,069.76 × 66,410.88
  4. Step 4: Simplify right side
    116,712x = 10,696,784,502.99
  5. Step 5: Solve for x
    x = 10,696,784,502.99/116,712
  6. Step 6: Final answer
    x = 91,651.11

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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.