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Finding the Fourth Proportional to 180,921.80, 249,701.98 and 100,375.28

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Solution

The fourth proportional to 180,921.80, 249,701.98 and 100,375.28 is: 138,534.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,921.80 : 249,701.98 = 100,375.28 : x
  2. Step 2: Convert to fraction form
    180,921.80/249,701.98 = 100,375.28/x
  3. Step 3: Cross multiply
    180,921.80x = 249,701.98 × 100,375.28
  4. Step 4: Simplify right side
    180,921.80x = 25,063,906,159.05
  5. Step 5: Solve for x
    x = 25,063,906,159.05/180,921.80
  6. Step 6: Final answer
    x = 138,534.47

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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.