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Finding the Fourth Proportional to 116,772.45, 161,146.47 and 65,785.79

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Solution

The fourth proportional to 116,772.45, 161,146.47 and 65,785.79 is: 90,784.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,772.45 : 161,146.47 = 65,785.79 : x
  2. Step 2: Convert to fraction form
    116,772.45/161,146.47 = 65,785.79/x
  3. Step 3: Cross multiply
    116,772.45x = 161,146.47 × 65,785.79
  4. Step 4: Simplify right side
    116,772.45x = 10,601,147,028.93
  5. Step 5: Solve for x
    x = 10,601,147,028.93/116,772.45
  6. Step 6: Final answer
    x = 90,784.66

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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.