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Finding the Fourth Proportional to 128,027.20, 192,040.80 and 117,918.40

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Solution

The fourth proportional to 128,027.20, 192,040.80 and 117,918.40 is: 176,877.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,027.20 : 192,040.80 = 117,918.40 : x
  2. Step 2: Convert to fraction form
    128,027.20/192,040.80 = 117,918.40/x
  3. Step 3: Cross multiply
    128,027.20x = 192,040.80 × 117,918.40
  4. Step 4: Simplify right side
    128,027.20x = 22,645,143,870.72
  5. Step 5: Solve for x
    x = 22,645,143,870.72/128,027.20
  6. Step 6: Final answer
    x = 176,877.60

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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.