Home / 128,310,644.96-177,072,171.75-72,564,401.61

Finding the Fourth Proportional to 128,310,644.96, 177,072,171.75 and 72,564,401.61

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Solution

The fourth proportional to 128,310,644.96, 177,072,171.75 and 72,564,401.61 is: 100,140,843.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310,644.96 : 177,072,171.75 = 72,564,401.61 : x
  2. Step 2: Convert to fraction form
    128,310,644.96/177,072,171.75 = 72,564,401.61/x
  3. Step 3: Cross multiply
    128,310,644.96x = 177,072,171.75 × 72,564,401.61
  4. Step 4: Simplify right side
    128,310,644.96x = 12,849,136,184,821,896
  5. Step 5: Solve for x
    x = 12,849,136,184,821,896/128,310,644.96
  6. Step 6: Final answer
    x = 100,140,843.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.