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Finding the Fourth Proportional to 249,372, 344,135.28 and 136,194.78

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Solution

The fourth proportional to 249,372, 344,135.28 and 136,194.78 is: 187,949.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,372 : 344,135.28 = 136,194.78 : x
  2. Step 2: Convert to fraction form
    249,372/344,135.28 = 136,194.78/x
  3. Step 3: Cross multiply
    249,372x = 344,135.28 × 136,194.78
  4. Step 4: Simplify right side
    249,372x = 46,869,428,749.84
  5. Step 5: Solve for x
    x = 46,869,428,749.84/249,372
  6. Step 6: Final answer
    x = 187,949.85

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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.