Home / 128,993.12-193,564.38-54,106.60

Finding the Fourth Proportional to 128,993.12, 193,564.38 and 54,106.60

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Solution

The fourth proportional to 128,993.12, 193,564.38 and 54,106.60 is: 81,191.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,993.12 : 193,564.38 = 54,106.60 : x
  2. Step 2: Convert to fraction form
    128,993.12/193,564.38 = 54,106.60/x
  3. Step 3: Cross multiply
    128,993.12x = 193,564.38 × 54,106.60
  4. Step 4: Simplify right side
    128,993.12x = 10,473,110,482.91
  5. Step 5: Solve for x
    x = 10,473,110,482.91/128,993.12
  6. Step 6: Final answer
    x = 81,191.23

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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.