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Finding the Fourth Proportional to 84,392,461.80, 126,588,692.70 and 80,991,239.40

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Solution

The fourth proportional to 84,392,461.80, 126,588,692.70 and 80,991,239.40 is: 121,486,859.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,392,461.80 : 126,588,692.70 = 80,991,239.40 : x
  2. Step 2: Convert to fraction form
    84,392,461.80/126,588,692.70 = 80,991,239.40/x
  3. Step 3: Cross multiply
    84,392,461.80x = 126,588,692.70 × 80,991,239.40
  4. Step 4: Simplify right side
    84,392,461.80x = 10,252,575,115,798,734
  5. Step 5: Solve for x
    x = 10,252,575,115,798,734/84,392,461.80
  6. Step 6: Final answer
    x = 121,486,859.10

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1.5x scale

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.