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Finding the Fourth Proportional to 109,708.16, 151,338.72 and 73,836.80

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Solution

The fourth proportional to 109,708.16, 151,338.72 and 73,836.80 is: 101,855.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,708.16 : 151,338.72 = 73,836.80 : x
  2. Step 2: Convert to fraction form
    109,708.16/151,338.72 = 73,836.80/x
  3. Step 3: Cross multiply
    109,708.16x = 151,338.72 × 73,836.80
  4. Step 4: Simplify right side
    109,708.16x = 11,174,366,800.90
  5. Step 5: Solve for x
    x = 11,174,366,800.90/109,708.16
  6. Step 6: Final answer
    x = 101,855.38

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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.