Home / 420,095,183.19-630,119,995.92-128,962,355.55

Finding the Fourth Proportional to 420,095,183.19, 630,119,995.92 and 128,962,355.55

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Solution

The fourth proportional to 420,095,183.19, 630,119,995.92 and 128,962,355.55 is: 193,436,540.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,095,183.19 : 630,119,995.92 = 128,962,355.55 : x
  2. Step 2: Convert to fraction form
    420,095,183.19/630,119,995.92 = 128,962,355.55/x
  3. Step 3: Cross multiply
    420,095,183.19x = 630,119,995.92 × 128,962,355.55
  4. Step 4: Simplify right side
    420,095,183.19x = 81,261,758,952,999,584
  5. Step 5: Solve for x
    x = 81,261,758,952,999,584/420,095,183.19
  6. Step 6: Final answer
    x = 193,436,540.59

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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.