Home / 128,128.55-192,197.88-48,158.45

Finding the Fourth Proportional to 128,128.55, 192,197.88 and 48,158.45

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Solution

The fourth proportional to 128,128.55, 192,197.88 and 48,158.45 is: 72,239.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,128.55 : 192,197.88 = 48,158.45 : x
  2. Step 2: Convert to fraction form
    128,128.55/192,197.88 = 48,158.45/x
  3. Step 3: Cross multiply
    128,128.55x = 192,197.88 × 48,158.45
  4. Step 4: Simplify right side
    128,128.55x = 9,255,951,994.09
  5. Step 5: Solve for x
    x = 9,255,951,994.09/128,128.55
  6. Step 6: Final answer
    x = 72,239.57

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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.