Home / 128,965,904.20-193,196,913.90-77,695,625.80

Finding the Fourth Proportional to 128,965,904.20, 193,196,913.90 and 77,695,625.80

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Solution

The fourth proportional to 128,965,904.20, 193,196,913.90 and 77,695,625.80 is: 116,391,655.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,965,904.20 : 193,196,913.90 = 77,695,625.80 : x
  2. Step 2: Convert to fraction form
    128,965,904.20/193,196,913.90 = 77,695,625.80/x
  3. Step 3: Cross multiply
    128,965,904.20x = 193,196,913.90 × 77,695,625.80
  4. Step 4: Simplify right side
    128,965,904.20x = 15,010,555,128,089,218
  5. Step 5: Solve for x
    x = 15,010,555,128,089,218/128,965,904.20
  6. Step 6: Final answer
    x = 116,391,655.77

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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.