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Finding the Fourth Proportional to 128,607.51, 192,911.28 and 53,686.77

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Solution

The fourth proportional to 128,607.51, 192,911.28 and 53,686.77 is: 80,530.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,607.51 : 192,911.28 = 53,686.77 : x
  2. Step 2: Convert to fraction form
    128,607.51/192,911.28 = 53,686.77/x
  3. Step 3: Cross multiply
    128,607.51x = 192,911.28 × 53,686.77
  4. Step 4: Simplify right side
    128,607.51x = 10,356,783,519.77
  5. Step 5: Solve for x
    x = 10,356,783,519.77/128,607.51
  6. Step 6: Final answer
    x = 80,530.16

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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.