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Finding the Fourth Proportional to 66,078.60, 99,117.90 and 34,974.60

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Solution

The fourth proportional to 66,078.60, 99,117.90 and 34,974.60 is: 52,461.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,078.60 : 99,117.90 = 34,974.60 : x
  2. Step 2: Convert to fraction form
    66,078.60/99,117.90 = 34,974.60/x
  3. Step 3: Cross multiply
    66,078.60x = 99,117.90 × 34,974.60
  4. Step 4: Simplify right side
    66,078.60x = 3,466,608,905.34
  5. Step 5: Solve for x
    x = 3,466,608,905.34/66,078.60
  6. Step 6: Final answer
    x = 52,461.90

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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.