Home / 128,935.70-193,403.55-86,945.30

Finding the Fourth Proportional to 128,935.70, 193,403.55 and 86,945.30

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Solution

The fourth proportional to 128,935.70, 193,403.55 and 86,945.30 is: 130,417.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935.70 : 193,403.55 = 86,945.30 : x
  2. Step 2: Convert to fraction form
    128,935.70/193,403.55 = 86,945.30/x
  3. Step 3: Cross multiply
    128,935.70x = 193,403.55 × 86,945.30
  4. Step 4: Simplify right side
    128,935.70x = 16,815,529,675.82
  5. Step 5: Solve for x
    x = 16,815,529,675.82/128,935.70
  6. Step 6: Final answer
    x = 130,417.95

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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.