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Finding the Fourth Proportional to 103,540.80, 155,311.20 and 98,729.40

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Solution

The fourth proportional to 103,540.80, 155,311.20 and 98,729.40 is: 148,094.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,540.80 : 155,311.20 = 98,729.40 : x
  2. Step 2: Convert to fraction form
    103,540.80/155,311.20 = 98,729.40/x
  3. Step 3: Cross multiply
    103,540.80x = 155,311.20 × 98,729.40
  4. Step 4: Simplify right side
    103,540.80x = 15,333,781,589.28
  5. Step 5: Solve for x
    x = 15,333,781,589.28/103,540.80
  6. Step 6: Final answer
    x = 148,094.10

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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.