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Finding the Fourth Proportional to 128,684.16, 193,017.12 and 39,935.52

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Solution

The fourth proportional to 128,684.16, 193,017.12 and 39,935.52 is: 59,900.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,684.16 : 193,017.12 = 39,935.52 : x
  2. Step 2: Convert to fraction form
    128,684.16/193,017.12 = 39,935.52/x
  3. Step 3: Cross multiply
    128,684.16x = 193,017.12 × 39,935.52
  4. Step 4: Simplify right side
    128,684.16x = 7,708,239,056.10
  5. Step 5: Solve for x
    x = 7,708,239,056.10/128,684.16
  6. Step 6: Final answer
    x = 59,900.45

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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.