Home / 128,988.90-193,286.10-54,068.20

Finding the Fourth Proportional to 128,988.90, 193,286.10 and 54,068.20

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Solution

The fourth proportional to 128,988.90, 193,286.10 and 54,068.20 is: 81,019.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,988.90 : 193,286.10 = 54,068.20 : x
  2. Step 2: Convert to fraction form
    128,988.90/193,286.10 = 54,068.20/x
  3. Step 3: Cross multiply
    128,988.90x = 193,286.10 × 54,068.20
  4. Step 4: Simplify right side
    128,988.90x = 10,450,631,512.02
  5. Step 5: Solve for x
    x = 10,450,631,512.02/128,988.90
  6. Step 6: Final answer
    x = 81,019.62

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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.