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Finding the Fourth Proportional to 128,543.80, 192,585.30 and 110,111.80

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Solution

The fourth proportional to 128,543.80, 192,585.30 and 110,111.80 is: 164,970.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,543.80 : 192,585.30 = 110,111.80 : x
  2. Step 2: Convert to fraction form
    128,543.80/192,585.30 = 110,111.80/x
  3. Step 3: Cross multiply
    128,543.80x = 192,585.30 × 110,111.80
  4. Step 4: Simplify right side
    128,543.80x = 21,205,914,036.54
  5. Step 5: Solve for x
    x = 21,205,914,036.54/128,543.80
  6. Step 6: Final answer
    x = 164,970.34

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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.