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Finding the Fourth Proportional to 268,672.40, 402,911.40 and 108,681.20

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Solution

The fourth proportional to 268,672.40, 402,911.40 and 108,681.20 is: 162,982.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,672.40 : 402,911.40 = 108,681.20 : x
  2. Step 2: Convert to fraction form
    268,672.40/402,911.40 = 108,681.20/x
  3. Step 3: Cross multiply
    268,672.40x = 402,911.40 × 108,681.20
  4. Step 4: Simplify right side
    268,672.40x = 43,788,894,445.68
  5. Step 5: Solve for x
    x = 43,788,894,445.68/268,672.40
  6. Step 6: Final answer
    x = 162,982.48

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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.