Home / 81,192,495.20-121,788,742.80-20,608,221.20

Finding the Fourth Proportional to 81,192,495.20, 121,788,742.80 and 20,608,221.20

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Solution

The fourth proportional to 81,192,495.20, 121,788,742.80 and 20,608,221.20 is: 30,912,331.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,192,495.20 : 121,788,742.80 = 20,608,221.20 : x
  2. Step 2: Convert to fraction form
    81,192,495.20/121,788,742.80 = 20,608,221.20/x
  3. Step 3: Cross multiply
    81,192,495.20x = 121,788,742.80 × 20,608,221.20
  4. Step 4: Simplify right side
    81,192,495.20x = 2,509,849,351,292,307
  5. Step 5: Solve for x
    x = 2,509,849,351,292,307/81,192,495.20
  6. Step 6: Final answer
    x = 30,912,331.80

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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.