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Finding the Fourth Proportional to 99,793,090.60, 149,689,635.90 and 85,180,431.40

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Solution

The fourth proportional to 99,793,090.60, 149,689,635.90 and 85,180,431.40 is: 127,770,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,793,090.60 : 149,689,635.90 = 85,180,431.40 : x
  2. Step 2: Convert to fraction form
    99,793,090.60/149,689,635.90 = 85,180,431.40/x
  3. Step 3: Cross multiply
    99,793,090.60x = 149,689,635.90 × 85,180,431.40
  4. Step 4: Simplify right side
    99,793,090.60x = 12,750,627,762,070,928
  5. Step 5: Solve for x
    x = 12,750,627,762,070,928/99,793,090.60
  6. Step 6: Final answer
    x = 127,770,647.10

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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.