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Finding the Fourth Proportional to 71,946.40, 107,919.60 and 60,282.40

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Solution

The fourth proportional to 71,946.40, 107,919.60 and 60,282.40 is: 90,423.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,946.40 : 107,919.60 = 60,282.40 : x
  2. Step 2: Convert to fraction form
    71,946.40/107,919.60 = 60,282.40/x
  3. Step 3: Cross multiply
    71,946.40x = 107,919.60 × 60,282.40
  4. Step 4: Simplify right side
    71,946.40x = 6,505,652,495.04
  5. Step 5: Solve for x
    x = 6,505,652,495.04/71,946.40
  6. Step 6: Final answer
    x = 90,423.60

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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.