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Finding the Fourth Proportional to 21,050,129.80, 31,575,194.70 and 21,050,129.80

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Solution

The fourth proportional to 21,050,129.80, 31,575,194.70 and 21,050,129.80 is: 31,575,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,050,129.80 : 31,575,194.70 = 21,050,129.80 : x
  2. Step 2: Convert to fraction form
    21,050,129.80/31,575,194.70 = 21,050,129.80/x
  3. Step 3: Cross multiply
    21,050,129.80x = 31,575,194.70 × 21,050,129.80
  4. Step 4: Simplify right side
    21,050,129.80x = 664,661,946,895,272.12
  5. Step 5: Solve for x
    x = 664,661,946,895,272.12/21,050,129.80
  6. Step 6: Final answer
    x = 31,575,194.70

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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.