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Finding the Fourth Proportional to 128,567.62, 192,069.58 and 83,219.56

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Solution

The fourth proportional to 128,567.62, 192,069.58 and 83,219.56 is: 124,323.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,567.62 : 192,069.58 = 83,219.56 : x
  2. Step 2: Convert to fraction form
    128,567.62/192,069.58 = 83,219.56/x
  3. Step 3: Cross multiply
    128,567.62x = 192,069.58 × 83,219.56
  4. Step 4: Simplify right side
    128,567.62x = 15,983,946,209.11
  5. Step 5: Solve for x
    x = 15,983,946,209.11/128,567.62
  6. Step 6: Final answer
    x = 124,323.27

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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.