Home / 420,345,210.24-630,577,987.02-129,236,772.51

Finding the Fourth Proportional to 420,345,210.24, 630,577,987.02 and 129,236,772.51

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Solution

The fourth proportional to 420,345,210.24, 630,577,987.02 and 129,236,772.51 is: 193,873,658.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,345,210.24 : 630,577,987.02 = 129,236,772.51 : x
  2. Step 2: Convert to fraction form
    420,345,210.24/630,577,987.02 = 129,236,772.51/x
  3. Step 3: Cross multiply
    420,345,210.24x = 630,577,987.02 × 129,236,772.51
  4. Step 4: Simplify right side
    420,345,210.24x = 81,493,863,858,317,472
  5. Step 5: Solve for x
    x = 81,493,863,858,317,472/420,345,210.24
  6. Step 6: Final answer
    x = 193,873,658.78

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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.