Home / 128,304,443.60-192,456,665.40-77,286,107.60

Finding the Fourth Proportional to 128,304,443.60, 192,456,665.40 and 77,286,107.60

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Solution

The fourth proportional to 128,304,443.60, 192,456,665.40 and 77,286,107.60 is: 115,929,161.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,443.60 : 192,456,665.40 = 77,286,107.60 : x
  2. Step 2: Convert to fraction form
    128,304,443.60/192,456,665.40 = 77,286,107.60/x
  3. Step 3: Cross multiply
    128,304,443.60x = 192,456,665.40 × 77,286,107.60
  4. Step 4: Simplify right side
    128,304,443.60x = 14,874,226,550,441,596
  5. Step 5: Solve for x
    x = 14,874,226,550,441,596/128,304,443.60
  6. Step 6: Final answer
    x = 115,929,161.40

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1.5x scale

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.