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Finding the Fourth Proportional to 116,690.05, 161,047.61 and 65,712.74

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Solution

The fourth proportional to 116,690.05, 161,047.61 and 65,712.74 is: 90,692.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,690.05 : 161,047.61 = 65,712.74 : x
  2. Step 2: Convert to fraction form
    116,690.05/161,047.61 = 65,712.74/x
  3. Step 3: Cross multiply
    116,690.05x = 161,047.61 × 65,712.74
  4. Step 4: Simplify right side
    116,690.05x = 10,582,878,836.17
  5. Step 5: Solve for x
    x = 10,582,878,836.17/116,690.05
  6. Step 6: Final answer
    x = 90,692.21

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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.