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Finding the Fourth Proportional to 68,712.40, 103,068.60 and 61,195.60

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Solution

The fourth proportional to 68,712.40, 103,068.60 and 61,195.60 is: 91,793.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,712.40 : 103,068.60 = 61,195.60 : x
  2. Step 2: Convert to fraction form
    68,712.40/103,068.60 = 61,195.60/x
  3. Step 3: Cross multiply
    68,712.40x = 103,068.60 × 61,195.60
  4. Step 4: Simplify right side
    68,712.40x = 6,307,344,818.16
  5. Step 5: Solve for x
    x = 6,307,344,818.16/68,712.40
  6. Step 6: Final answer
    x = 91,793.40

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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.