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Finding the Fourth Proportional to 107,930.40, 161,636.40 and 103,264.80

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Solution

The fourth proportional to 107,930.40, 161,636.40 and 103,264.80 is: 154,649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,930.40 : 161,636.40 = 103,264.80 : x
  2. Step 2: Convert to fraction form
    107,930.40/161,636.40 = 103,264.80/x
  3. Step 3: Cross multiply
    107,930.40x = 161,636.40 × 103,264.80
  4. Step 4: Simplify right side
    107,930.40x = 16,691,350,518.72
  5. Step 5: Solve for x
    x = 16,691,350,518.72/107,930.40
  6. Step 6: Final answer
    x = 154,649.20

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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.