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Finding the Fourth Proportional to 209,958,763.80, 314,938,145.70 and 56,620,320.60

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Solution

The fourth proportional to 209,958,763.80, 314,938,145.70 and 56,620,320.60 is: 84,930,480.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,958,763.80 : 314,938,145.70 = 56,620,320.60 : x
  2. Step 2: Convert to fraction form
    209,958,763.80/314,938,145.70 = 56,620,320.60/x
  3. Step 3: Cross multiply
    209,958,763.80x = 314,938,145.70 × 56,620,320.60
  4. Step 4: Simplify right side
    209,958,763.80x = 17,831,898,778,703,512
  5. Step 5: Solve for x
    x = 17,831,898,778,703,512/209,958,763.80
  6. Step 6: Final answer
    x = 84,930,480.90

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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.