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Finding the Fourth Proportional to 128,270.60, 192,017.10 and 96,907.40

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Solution

The fourth proportional to 128,270.60, 192,017.10 and 96,907.40 is: 145,067.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,270.60 : 192,017.10 = 96,907.40 : x
  2. Step 2: Convert to fraction form
    128,270.60/192,017.10 = 96,907.40/x
  3. Step 3: Cross multiply
    128,270.60x = 192,017.10 × 96,907.40
  4. Step 4: Simplify right side
    128,270.60x = 18,607,877,916.54
  5. Step 5: Solve for x
    x = 18,607,877,916.54/128,270.60
  6. Step 6: Final answer
    x = 145,067.36

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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.