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Finding the Fourth Proportional to 188,543.36, 260,191.56 and 103,661

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Solution

The fourth proportional to 188,543.36, 260,191.56 and 103,661 is: 143,053.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,543.36 : 260,191.56 = 103,661 : x
  2. Step 2: Convert to fraction form
    188,543.36/260,191.56 = 103,661/x
  3. Step 3: Cross multiply
    188,543.36x = 260,191.56 × 103,661
  4. Step 4: Simplify right side
    188,543.36x = 26,971,717,301.16
  5. Step 5: Solve for x
    x = 26,971,717,301.16/188,543.36
  6. Step 6: Final answer
    x = 143,053.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.