Home / 128,394,456.72-192,623,055.08-40,955,988.86

Finding the Fourth Proportional to 128,394,456.72, 192,623,055.08 and 40,955,988.86

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Solution

The fourth proportional to 128,394,456.72, 192,623,055.08 and 40,955,988.86 is: 61,443,989.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,394,456.72 : 192,623,055.08 = 40,955,988.86 : x
  2. Step 2: Convert to fraction form
    128,394,456.72/192,623,055.08 = 40,955,988.86/x
  3. Step 3: Cross multiply
    128,394,456.72x = 192,623,055.08 × 40,955,988.86
  4. Step 4: Simplify right side
    128,394,456.72x = 7,889,067,697,590,087
  5. Step 5: Solve for x
    x = 7,889,067,697,590,087/128,394,456.72
  6. Step 6: Final answer
    x = 61,443,989.87

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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.