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Finding the Fourth Proportional to 103,659.40, 155,489.10 and 82,923.40

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Solution

The fourth proportional to 103,659.40, 155,489.10 and 82,923.40 is: 124,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,659.40 : 155,489.10 = 82,923.40 : x
  2. Step 2: Convert to fraction form
    103,659.40/155,489.10 = 82,923.40/x
  3. Step 3: Cross multiply
    103,659.40x = 155,489.10 × 82,923.40
  4. Step 4: Simplify right side
    103,659.40x = 12,893,684,834.94
  5. Step 5: Solve for x
    x = 12,893,684,834.94/103,659.40
  6. Step 6: Final answer
    x = 124,385.10

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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.