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Finding the Fourth Proportional to 103,800.40, 155,700.60 and 66,402.70

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Solution

The fourth proportional to 103,800.40, 155,700.60 and 66,402.70 is: 99,604.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,800.40 : 155,700.60 = 66,402.70 : x
  2. Step 2: Convert to fraction form
    103,800.40/155,700.60 = 66,402.70/x
  3. Step 3: Cross multiply
    103,800.40x = 155,700.60 × 66,402.70
  4. Step 4: Simplify right side
    103,800.40x = 10,338,940,231.62
  5. Step 5: Solve for x
    x = 10,338,940,231.62/103,800.40
  6. Step 6: Final answer
    x = 99,604.05

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1.5x scale

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.