Home / 128,963,712.20-193,193,625.90-77,693,433.80

Finding the Fourth Proportional to 128,963,712.20, 193,193,625.90 and 77,693,433.80

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Solution

The fourth proportional to 128,963,712.20, 193,193,625.90 and 77,693,433.80 is: 116,388,369.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,963,712.20 : 193,193,625.90 = 77,693,433.80 : x
  2. Step 2: Convert to fraction form
    128,963,712.20/193,193,625.90 = 77,693,433.80/x
  3. Step 3: Cross multiply
    128,963,712.20x = 193,193,625.90 × 77,693,433.80
  4. Step 4: Simplify right side
    128,963,712.20x = 15,009,876,184,443,616
  5. Step 5: Solve for x
    x = 15,009,876,184,443,616/128,963,712.20
  6. Step 6: Final answer
    x = 116,388,369.48

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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.