Home / 128,281,147.44-177,021,165.42-72,523,234.18

Finding the Fourth Proportional to 128,281,147.44, 177,021,165.42 and 72,523,234.18

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Solution

The fourth proportional to 128,281,147.44, 177,021,165.42 and 72,523,234.18 is: 100,078,208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,281,147.44 : 177,021,165.42 = 72,523,234.18 : x
  2. Step 2: Convert to fraction form
    128,281,147.44/177,021,165.42 = 72,523,234.18/x
  3. Step 3: Cross multiply
    128,281,147.44x = 177,021,165.42 × 72,523,234.18
  4. Step 4: Simplify right side
    128,281,147.44x = 12,838,147,434,571,178
  5. Step 5: Solve for x
    x = 12,838,147,434,571,178/128,281,147.44
  6. Step 6: Final answer
    x = 100,078,208.61

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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.