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Finding the Fourth Proportional to 70,990.38, 106,429.36 and 35,433.40

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Solution

The fourth proportional to 70,990.38, 106,429.36 and 35,433.40 is: 53,122.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,990.38 : 106,429.36 = 35,433.40 : x
  2. Step 2: Convert to fraction form
    70,990.38/106,429.36 = 35,433.40/x
  3. Step 3: Cross multiply
    70,990.38x = 106,429.36 × 35,433.40
  4. Step 4: Simplify right side
    70,990.38x = 3,771,154,084.62
  5. Step 5: Solve for x
    x = 3,771,154,084.62/70,990.38
  6. Step 6: Final answer
    x = 53,122.04

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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.