Home / 420,829,080.40-631,243,620.60-129,670,271.20

Finding the Fourth Proportional to 420,829,080.40, 631,243,620.60 and 129,670,271.20

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Solution

The fourth proportional to 420,829,080.40, 631,243,620.60 and 129,670,271.20 is: 194,505,406.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,829,080.40 : 631,243,620.60 = 129,670,271.20 : x
  2. Step 2: Convert to fraction form
    420,829,080.40/631,243,620.60 = 129,670,271.20/x
  3. Step 3: Cross multiply
    420,829,080.40x = 631,243,620.60 × 129,670,271.20
  4. Step 4: Simplify right side
    420,829,080.40x = 81,853,531,476,471,904
  5. Step 5: Solve for x
    x = 81,853,531,476,471,904/420,829,080.40
  6. Step 6: Final answer
    x = 194,505,406.80

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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.