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Finding the Fourth Proportional to 66,108,692.20, 99,163,038.30 and 45,701,357.80

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Solution

The fourth proportional to 66,108,692.20, 99,163,038.30 and 45,701,357.80 is: 68,552,036.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,108,692.20 : 99,163,038.30 = 45,701,357.80 : x
  2. Step 2: Convert to fraction form
    66,108,692.20/99,163,038.30 = 45,701,357.80/x
  3. Step 3: Cross multiply
    66,108,692.20x = 99,163,038.30 × 45,701,357.80
  4. Step 4: Simplify right side
    66,108,692.20x = 4,531,885,493,883,403
  5. Step 5: Solve for x
    x = 4,531,885,493,883,403/66,108,692.20
  6. Step 6: Final answer
    x = 68,552,036.70

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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.