Home / 128,081.12-192,116.64-39,330.08

Finding the Fourth Proportional to 128,081.12, 192,116.64 and 39,330.08

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Solution

The fourth proportional to 128,081.12, 192,116.64 and 39,330.08 is: 58,993.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,081.12 : 192,116.64 = 39,330.08 : x
  2. Step 2: Convert to fraction form
    128,081.12/192,116.64 = 39,330.08/x
  3. Step 3: Cross multiply
    128,081.12x = 192,116.64 × 39,330.08
  4. Step 4: Simplify right side
    128,081.12x = 7,555,962,820.53
  5. Step 5: Solve for x
    x = 7,555,962,820.53/128,081.12
  6. Step 6: Final answer
    x = 58,993.57

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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.