Home / 128,639.24-193,135.59-65,501.77

Finding the Fourth Proportional to 128,639.24, 193,135.59 and 65,501.77

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Solution

The fourth proportional to 128,639.24, 193,135.59 and 65,501.77 is: 98,342.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,639.24 : 193,135.59 = 65,501.77 : x
  2. Step 2: Convert to fraction form
    128,639.24/193,135.59 = 65,501.77/x
  3. Step 3: Cross multiply
    128,639.24x = 193,135.59 × 65,501.77
  4. Step 4: Simplify right side
    128,639.24x = 12,650,722,994.99
  5. Step 5: Solve for x
    x = 12,650,722,994.99/128,639.24
  6. Step 6: Final answer
    x = 98,342.64

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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.