Home / 128,323,208.80-192,484,813.20-77,304,872.80

Finding the Fourth Proportional to 128,323,208.80, 192,484,813.20 and 77,304,872.80

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Solution

The fourth proportional to 128,323,208.80, 192,484,813.20 and 77,304,872.80 is: 115,957,309.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,323,208.80 : 192,484,813.20 = 77,304,872.80 : x
  2. Step 2: Convert to fraction form
    128,323,208.80/192,484,813.20 = 77,304,872.80/x
  3. Step 3: Cross multiply
    128,323,208.80x = 192,484,813.20 × 77,304,872.80
  4. Step 4: Simplify right side
    128,323,208.80x = 14,880,014,000,357,760
  5. Step 5: Solve for x
    x = 14,880,014,000,357,760/128,323,208.80
  6. Step 6: Final answer
    x = 115,957,309.20

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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.