Home / 128,007.12-192,145.98-71,895.18

Finding the Fourth Proportional to 128,007.12, 192,145.98 and 71,895.18

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Solution

The fourth proportional to 128,007.12, 192,145.98 and 71,895.18 is: 107,918.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,007.12 : 192,145.98 = 71,895.18 : x
  2. Step 2: Convert to fraction form
    128,007.12/192,145.98 = 71,895.18/x
  3. Step 3: Cross multiply
    128,007.12x = 192,145.98 × 71,895.18
  4. Step 4: Simplify right side
    128,007.12x = 13,814,369,818.38
  5. Step 5: Solve for x
    x = 13,814,369,818.38/128,007.12
  6. Step 6: Final answer
    x = 107,918.76

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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.