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Finding the Fourth Proportional to 128,722.26, 192,679.47 and 88,506.57

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Solution

The fourth proportional to 128,722.26, 192,679.47 and 88,506.57 is: 132,482.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722.26 : 192,679.47 = 88,506.57 : x
  2. Step 2: Convert to fraction form
    128,722.26/192,679.47 = 88,506.57/x
  3. Step 3: Cross multiply
    128,722.26x = 192,679.47 × 88,506.57
  4. Step 4: Simplify right side
    128,722.26x = 17,053,398,999.12
  5. Step 5: Solve for x
    x = 17,053,398,999.12/128,722.26
  6. Step 6: Final answer
    x = 132,482.13

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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.