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Finding the Fourth Proportional to 286,170,692.80, 429,256,039.20 and 70,759,940.80

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Solution

The fourth proportional to 286,170,692.80, 429,256,039.20 and 70,759,940.80 is: 106,139,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,170,692.80 : 429,256,039.20 = 70,759,940.80 : x
  2. Step 2: Convert to fraction form
    286,170,692.80/429,256,039.20 = 70,759,940.80/x
  3. Step 3: Cross multiply
    286,170,692.80x = 429,256,039.20 × 70,759,940.80
  4. Step 4: Simplify right side
    286,170,692.80x = 30,374,131,921,834,476
  5. Step 5: Solve for x
    x = 30,374,131,921,834,476/286,170,692.80
  6. Step 6: Final answer
    x = 106,139,911.20

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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.