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Finding the Fourth Proportional to 149,779,910.20, 209,974,989.80 and 149,779,910.20

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Solution

The fourth proportional to 149,779,910.20, 209,974,989.80 and 149,779,910.20 is: 209,974,989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,779,910.20 : 209,974,989.80 = 149,779,910.20 : x
  2. Step 2: Convert to fraction form
    149,779,910.20/209,974,989.80 = 149,779,910.20/x
  3. Step 3: Cross multiply
    149,779,910.20x = 209,974,989.80 × 149,779,910.20
  4. Step 4: Simplify right side
    149,779,910.20x = 31,450,035,116,489,916
  5. Step 5: Solve for x
    x = 31,450,035,116,489,916/149,779,910.20
  6. Step 6: Final answer
    x = 209,974,989.80

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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.