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Finding the Fourth Proportional to 61,199,124.60, 91,798,686.90 and 20,809,608.60

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Solution

The fourth proportional to 61,199,124.60, 91,798,686.90 and 20,809,608.60 is: 31,214,412.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,199,124.60 : 91,798,686.90 = 20,809,608.60 : x
  2. Step 2: Convert to fraction form
    61,199,124.60/91,798,686.90 = 20,809,608.60/x
  3. Step 3: Cross multiply
    61,199,124.60x = 91,798,686.90 × 20,809,608.60
  4. Step 4: Simplify right side
    61,199,124.60x = 1,910,294,744,382,947.50
  5. Step 5: Solve for x
    x = 1,910,294,744,382,947.50/61,199,124.60
  6. Step 6: Final answer
    x = 31,214,412.90

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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.