Home / 128,308.80-192,458.88-58,139.04

Finding the Fourth Proportional to 128,308.80, 192,458.88 and 58,139.04

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Solution

The fourth proportional to 128,308.80, 192,458.88 and 58,139.04 is: 87,206.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,308.80 : 192,458.88 = 58,139.04 : x
  2. Step 2: Convert to fraction form
    128,308.80/192,458.88 = 58,139.04/x
  3. Step 3: Cross multiply
    128,308.80x = 192,458.88 × 58,139.04
  4. Step 4: Simplify right side
    128,308.80x = 11,189,374,522.68
  5. Step 5: Solve for x
    x = 11,189,374,522.68/128,308.80
  6. Step 6: Final answer
    x = 87,206.60

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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.