Home / 420,095,179.80-630,119,990.88-128,962,352.16

Finding the Fourth Proportional to 420,095,179.80, 630,119,990.88 and 128,962,352.16

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Solution

The fourth proportional to 420,095,179.80, 630,119,990.88 and 128,962,352.16 is: 193,436,535.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,095,179.80 : 630,119,990.88 = 128,962,352.16 : x
  2. Step 2: Convert to fraction form
    420,095,179.80/630,119,990.88 = 128,962,352.16/x
  3. Step 3: Cross multiply
    420,095,179.80x = 630,119,990.88 × 128,962,352.16
  4. Step 4: Simplify right side
    420,095,179.80x = 81,261,756,166,922,544
  5. Step 5: Solve for x
    x = 81,261,756,166,922,544/420,095,179.80
  6. Step 6: Final answer
    x = 193,436,535.51

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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.