Home / 128,938.60-193,626-84,036.22

Finding the Fourth Proportional to 128,938.60, 193,626 and 84,036.22

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Solution

The fourth proportional to 128,938.60, 193,626 and 84,036.22 is: 126,196.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,938.60 : 193,626 = 84,036.22 : x
  2. Step 2: Convert to fraction form
    128,938.60/193,626 = 84,036.22/x
  3. Step 3: Cross multiply
    128,938.60x = 193,626 × 84,036.22
  4. Step 4: Simplify right side
    128,938.60x = 16,271,597,133.72
  5. Step 5: Solve for x
    x = 16,271,597,133.72/128,938.60
  6. Step 6: Final answer
    x = 126,196.48

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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.