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Finding the Fourth Proportional to 135,329.60, 202,994.40 and 128,878.40

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Solution

The fourth proportional to 135,329.60, 202,994.40 and 128,878.40 is: 193,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,329.60 : 202,994.40 = 128,878.40 : x
  2. Step 2: Convert to fraction form
    135,329.60/202,994.40 = 128,878.40/x
  3. Step 3: Cross multiply
    135,329.60x = 202,994.40 × 128,878.40
  4. Step 4: Simplify right side
    135,329.60x = 26,161,593,480.96
  5. Step 5: Solve for x
    x = 26,161,593,480.96/135,329.60
  6. Step 6: Final answer
    x = 193,317.60

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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.