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Finding the Fourth Proportional to 128,812.50, 193,253.40 and 53,893.08

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Solution

The fourth proportional to 128,812.50, 193,253.40 and 53,893.08 is: 80,854.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,812.50 : 193,253.40 = 53,893.08 : x
  2. Step 2: Convert to fraction form
    128,812.50/193,253.40 = 53,893.08/x
  3. Step 3: Cross multiply
    128,812.50x = 193,253.40 × 53,893.08
  4. Step 4: Simplify right side
    128,812.50x = 10,415,020,946.47
  5. Step 5: Solve for x
    x = 10,415,020,946.47/128,812.50
  6. Step 6: Final answer
    x = 80,854.12

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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.