Home / 128,841.60-193,408.20-76,280.70

Finding the Fourth Proportional to 128,841.60, 193,408.20 and 76,280.70

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Solution

The fourth proportional to 128,841.60, 193,408.20 and 76,280.70 is: 114,507.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,841.60 : 193,408.20 = 76,280.70 : x
  2. Step 2: Convert to fraction form
    128,841.60/193,408.20 = 76,280.70/x
  3. Step 3: Cross multiply
    128,841.60x = 193,408.20 × 76,280.70
  4. Step 4: Simplify right side
    128,841.60x = 14,753,312,881.74
  5. Step 5: Solve for x
    x = 14,753,312,881.74/128,841.60
  6. Step 6: Final answer
    x = 114,507.37

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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.