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Finding the Fourth Proportional to 209,958,752.80, 314,938,129.20 and 56,620,309.60

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Solution

The fourth proportional to 209,958,752.80, 314,938,129.20 and 56,620,309.60 is: 84,930,464.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,958,752.80 : 314,938,129.20 = 56,620,309.60 : x
  2. Step 2: Convert to fraction form
    209,958,752.80/314,938,129.20 = 56,620,309.60/x
  3. Step 3: Cross multiply
    209,958,752.80x = 314,938,129.20 × 56,620,309.60
  4. Step 4: Simplify right side
    209,958,752.80x = 17,831,894,380,148,800
  5. Step 5: Solve for x
    x = 17,831,894,380,148,800/209,958,752.80
  6. Step 6: Final answer
    x = 84,930,464.40

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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.