Home / 128,638.24-193,134.09-65,500.77

Finding the Fourth Proportional to 128,638.24, 193,134.09 and 65,500.77

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Solution

The fourth proportional to 128,638.24, 193,134.09 and 65,500.77 is: 98,341.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,638.24 : 193,134.09 = 65,500.77 : x
  2. Step 2: Convert to fraction form
    128,638.24/193,134.09 = 65,500.77/x
  3. Step 3: Cross multiply
    128,638.24x = 193,134.09 × 65,500.77
  4. Step 4: Simplify right side
    128,638.24x = 12,650,431,123.31
  5. Step 5: Solve for x
    x = 12,650,431,123.31/128,638.24
  6. Step 6: Final answer
    x = 98,341.14

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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.