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Finding the Fourth Proportional to 21,101,999.90, 29,609,984.50 and 21,101,999.90

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Solution

The fourth proportional to 21,101,999.90, 29,609,984.50 and 21,101,999.90 is: 29,609,984.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101,999.90 : 29,609,984.50 = 21,101,999.90 : x
  2. Step 2: Convert to fraction form
    21,101,999.90/29,609,984.50 = 21,101,999.90/x
  3. Step 3: Cross multiply
    21,101,999.90x = 29,609,984.50 × 21,101,999.90
  4. Step 4: Simplify right side
    21,101,999.90x = 624,829,889,958,001.50
  5. Step 5: Solve for x
    x = 624,829,889,958,001.50/21,101,999.90
  6. Step 6: Final answer
    x = 29,609,984.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.