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Finding the Fourth Proportional to 249,414.88, 374,117.92 and 80,940

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Solution

The fourth proportional to 249,414.88, 374,117.92 and 80,940 is: 121,408.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,414.88 : 374,117.92 = 80,940 : x
  2. Step 2: Convert to fraction form
    249,414.88/374,117.92 = 80,940/x
  3. Step 3: Cross multiply
    249,414.88x = 374,117.92 × 80,940
  4. Step 4: Simplify right side
    249,414.88x = 30,281,104,444.80
  5. Step 5: Solve for x
    x = 30,281,104,444.80/249,414.88
  6. Step 6: Final answer
    x = 121,408.57

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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.