Home / 81,389,387.20-122,084,080.80-70,429,892.80

Finding the Fourth Proportional to 81,389,387.20, 122,084,080.80 and 70,429,892.80

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Solution

The fourth proportional to 81,389,387.20, 122,084,080.80 and 70,429,892.80 is: 105,644,839.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,389,387.20 : 122,084,080.80 = 70,429,892.80 : x
  2. Step 2: Convert to fraction form
    81,389,387.20/122,084,080.80 = 70,429,892.80/x
  3. Step 3: Cross multiply
    81,389,387.20x = 122,084,080.80 × 70,429,892.80
  4. Step 4: Simplify right side
    81,389,387.20x = 8,598,368,723,330,538
  5. Step 5: Solve for x
    x = 8,598,368,723,330,538/81,389,387.20
  6. Step 6: Final answer
    x = 105,644,839.20

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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.