Home / 128,397.82-192,438.99-72,119.63

Finding the Fourth Proportional to 128,397.82, 192,438.99 and 72,119.63

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Solution

The fourth proportional to 128,397.82, 192,438.99 and 72,119.63 is: 108,090.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,397.82 : 192,438.99 = 72,119.63 : x
  2. Step 2: Convert to fraction form
    128,397.82/192,438.99 = 72,119.63/x
  3. Step 3: Cross multiply
    128,397.82x = 192,438.99 × 72,119.63
  4. Step 4: Simplify right side
    128,397.82x = 13,878,627,433.58
  5. Step 5: Solve for x
    x = 13,878,627,433.58/128,397.82
  6. Step 6: Final answer
    x = 108,090.83

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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.