Home / 128,304,006.40-192,456,009.60-79,931,065.60

Finding the Fourth Proportional to 128,304,006.40, 192,456,009.60 and 79,931,065.60

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Solution

The fourth proportional to 128,304,006.40, 192,456,009.60 and 79,931,065.60 is: 119,896,598.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,006.40 : 192,456,009.60 = 79,931,065.60 : x
  2. Step 2: Convert to fraction form
    128,304,006.40/192,456,009.60 = 79,931,065.60/x
  3. Step 3: Cross multiply
    128,304,006.40x = 192,456,009.60 × 79,931,065.60
  4. Step 4: Simplify right side
    128,304,006.40x = 15,383,213,928,451,828
  5. Step 5: Solve for x
    x = 15,383,213,928,451,828/128,304,006.40
  6. Step 6: Final answer
    x = 119,896,598.40

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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.