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Finding the Fourth Proportional to 116,912.64, 161,329.68 and 65,937.90

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Solution

The fourth proportional to 116,912.64, 161,329.68 and 65,937.90 is: 90,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,912.64 : 161,329.68 = 65,937.90 : x
  2. Step 2: Convert to fraction form
    116,912.64/161,329.68 = 65,937.90/x
  3. Step 3: Cross multiply
    116,912.64x = 161,329.68 × 65,937.90
  4. Step 4: Simplify right side
    116,912.64x = 10,637,740,306.87
  5. Step 5: Solve for x
    x = 10,637,740,306.87/116,912.64
  6. Step 6: Final answer
    x = 90,988.80

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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.