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Finding the Fourth Proportional to 128,017.60, 192,026.40 and 118,686.40

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Solution

The fourth proportional to 128,017.60, 192,026.40 and 118,686.40 is: 178,029.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017.60 : 192,026.40 = 118,686.40 : x
  2. Step 2: Convert to fraction form
    128,017.60/192,026.40 = 118,686.40/x
  3. Step 3: Cross multiply
    128,017.60x = 192,026.40 × 118,686.40
  4. Step 4: Simplify right side
    128,017.60x = 22,790,922,120.96
  5. Step 5: Solve for x
    x = 22,790,922,120.96/128,017.60
  6. Step 6: Final answer
    x = 178,029.60

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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.