Home / 128,965,903.20-193,196,912.40-77,695,624.80

Finding the Fourth Proportional to 128,965,903.20, 193,196,912.40 and 77,695,624.80

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Solution

The fourth proportional to 128,965,903.20, 193,196,912.40 and 77,695,624.80 is: 116,391,654.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,965,903.20 : 193,196,912.40 = 77,695,624.80 : x
  2. Step 2: Convert to fraction form
    128,965,903.20/193,196,912.40 = 77,695,624.80/x
  3. Step 3: Cross multiply
    128,965,903.20x = 193,196,912.40 × 77,695,624.80
  4. Step 4: Simplify right side
    128,965,903.20x = 15,010,554,818,348,868
  5. Step 5: Solve for x
    x = 15,010,554,818,348,868/128,965,903.20
  6. Step 6: Final answer
    x = 116,391,654.27

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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.