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Finding the Fourth Proportional to 66,985,801.30, 100,478,701.95 and 66,418,930.90

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Solution

The fourth proportional to 66,985,801.30, 100,478,701.95 and 66,418,930.90 is: 99,628,396.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,985,801.30 : 100,478,701.95 = 66,418,930.90 : x
  2. Step 2: Convert to fraction form
    66,985,801.30/100,478,701.95 = 66,418,930.90/x
  3. Step 3: Cross multiply
    66,985,801.30x = 100,478,701.95 × 66,418,930.90
  4. Step 4: Simplify right side
    66,985,801.30x = 6,673,687,961,738,745
  5. Step 5: Solve for x
    x = 6,673,687,961,738,745/66,985,801.30
  6. Step 6: Final answer
    x = 99,628,396.35

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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.