Home / 128,328,009.70-192,492,014.55-99,662,563.30

Finding the Fourth Proportional to 128,328,009.70, 192,492,014.55 and 99,662,563.30

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Solution

The fourth proportional to 128,328,009.70, 192,492,014.55 and 99,662,563.30 is: 149,493,844.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328,009.70 : 192,492,014.55 = 99,662,563.30 : x
  2. Step 2: Convert to fraction form
    128,328,009.70/192,492,014.55 = 99,662,563.30/x
  3. Step 3: Cross multiply
    128,328,009.70x = 192,492,014.55 × 99,662,563.30
  4. Step 4: Simplify right side
    128,328,009.70x = 19,184,247,584,833,896
  5. Step 5: Solve for x
    x = 19,184,247,584,833,896/128,328,009.70
  6. Step 6: Final answer
    x = 149,493,844.95

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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.