Home / 138,420,461.60-207,630,692.40-66,756,845.60

Finding the Fourth Proportional to 138,420,461.60, 207,630,692.40 and 66,756,845.60

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Solution

The fourth proportional to 138,420,461.60, 207,630,692.40 and 66,756,845.60 is: 100,135,268.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,420,461.60 : 207,630,692.40 = 66,756,845.60 : x
  2. Step 2: Convert to fraction form
    138,420,461.60/207,630,692.40 = 66,756,845.60/x
  3. Step 3: Cross multiply
    138,420,461.60x = 207,630,692.40 × 66,756,845.60
  4. Step 4: Simplify right side
    138,420,461.60x = 13,860,770,074,367,894
  5. Step 5: Solve for x
    x = 13,860,770,074,367,894/138,420,461.60
  6. Step 6: Final answer
    x = 100,135,268.40

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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.