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Finding the Fourth Proportional to 249,672.20, 374,743.20 and 131,428.40

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Solution

The fourth proportional to 249,672.20, 374,743.20 and 131,428.40 is: 197,266.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,672.20 : 374,743.20 = 131,428.40 : x
  2. Step 2: Convert to fraction form
    249,672.20/374,743.20 = 131,428.40/x
  3. Step 3: Cross multiply
    249,672.20x = 374,743.20 × 131,428.40
  4. Step 4: Simplify right side
    249,672.20x = 49,251,899,186.88
  5. Step 5: Solve for x
    x = 49,251,899,186.88/249,672.20
  6. Step 6: Final answer
    x = 197,266.25

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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.