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Finding the Fourth Proportional to 128,000.16, 176,644.47 and 69,860.07

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Solution

The fourth proportional to 128,000.16, 176,644.47 and 69,860.07 is: 96,409.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,000.16 : 176,644.47 = 69,860.07 : x
  2. Step 2: Convert to fraction form
    128,000.16/176,644.47 = 69,860.07/x
  3. Step 3: Cross multiply
    128,000.16x = 176,644.47 × 69,860.07
  4. Step 4: Simplify right side
    128,000.16x = 12,340,395,039.31
  5. Step 5: Solve for x
    x = 12,340,395,039.31/128,000.16
  6. Step 6: Final answer
    x = 96,409.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.