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Finding the Fourth Proportional to 85,825.62, 128,107.14 and 79,808.94

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Solution

The fourth proportional to 85,825.62, 128,107.14 and 79,808.94 is: 119,126.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,825.62 : 128,107.14 = 79,808.94 : x
  2. Step 2: Convert to fraction form
    85,825.62/128,107.14 = 79,808.94/x
  3. Step 3: Cross multiply
    85,825.62x = 128,107.14 × 79,808.94
  4. Step 4: Simplify right side
    85,825.62x = 10,224,095,049.83
  5. Step 5: Solve for x
    x = 10,224,095,049.83/85,825.62
  6. Step 6: Final answer
    x = 119,126.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.