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Finding the Fourth Proportional to 141,343.40, 212,015.10 and 103,289.60

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Solution

The fourth proportional to 141,343.40, 212,015.10 and 103,289.60 is: 154,934.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,343.40 : 212,015.10 = 103,289.60 : x
  2. Step 2: Convert to fraction form
    141,343.40/212,015.10 = 103,289.60/x
  3. Step 3: Cross multiply
    141,343.40x = 212,015.10 × 103,289.60
  4. Step 4: Simplify right side
    141,343.40x = 21,898,954,872.96
  5. Step 5: Solve for x
    x = 21,898,954,872.96/141,343.40
  6. Step 6: Final answer
    x = 154,934.40

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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.