Home / 128,304,069.60-192,288,142.80-51,564,280.80

Finding the Fourth Proportional to 128,304,069.60, 192,288,142.80 and 51,564,280.80

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Solution

The fourth proportional to 128,304,069.60, 192,288,142.80 and 51,564,280.80 is: 77,278,918.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,069.60 : 192,288,142.80 = 51,564,280.80 : x
  2. Step 2: Convert to fraction form
    128,304,069.60/192,288,142.80 = 51,564,280.80/x
  3. Step 3: Cross multiply
    128,304,069.60x = 192,288,142.80 × 51,564,280.80
  4. Step 4: Simplify right side
    128,304,069.60x = 9,915,199,789,849,698
  5. Step 5: Solve for x
    x = 9,915,199,789,849,698/128,304,069.60
  6. Step 6: Final answer
    x = 77,278,918.91

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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.