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Finding the Fourth Proportional to 100,689.37, 151,036.10 and 80,605.64

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Solution

The fourth proportional to 100,689.37, 151,036.10 and 80,605.64 is: 120,910.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,689.37 : 151,036.10 = 80,605.64 : x
  2. Step 2: Convert to fraction form
    100,689.37/151,036.10 = 80,605.64/x
  3. Step 3: Cross multiply
    100,689.37x = 151,036.10 × 80,605.64
  4. Step 4: Simplify right side
    100,689.37x = 12,174,362,049.51
  5. Step 5: Solve for x
    x = 12,174,362,049.51/100,689.37
  6. Step 6: Final answer
    x = 120,910.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.