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Finding the Fourth Proportional to 66,830,868.40, 100,246,302.60 and 21,394,145.20

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Solution

The fourth proportional to 66,830,868.40, 100,246,302.60 and 21,394,145.20 is: 32,091,217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,830,868.40 : 100,246,302.60 = 21,394,145.20 : x
  2. Step 2: Convert to fraction form
    66,830,868.40/100,246,302.60 = 21,394,145.20/x
  3. Step 3: Cross multiply
    66,830,868.40x = 100,246,302.60 × 21,394,145.20
  4. Step 4: Simplify right side
    66,830,868.40x = 2,144,683,953,587,537.25
  5. Step 5: Solve for x
    x = 2,144,683,953,587,537.25/66,830,868.40
  6. Step 6: Final answer
    x = 32,091,217.80

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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.