Home / 128,860.98-177,837.03-72,276

Finding the Fourth Proportional to 128,860.98, 177,837.03 and 72,276

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Solution

The fourth proportional to 128,860.98, 177,837.03 and 72,276 is: 99,745.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,860.98 : 177,837.03 = 72,276 : x
  2. Step 2: Convert to fraction form
    128,860.98/177,837.03 = 72,276/x
  3. Step 3: Cross multiply
    128,860.98x = 177,837.03 × 72,276
  4. Step 4: Simplify right side
    128,860.98x = 12,853,349,180.28
  5. Step 5: Solve for x
    x = 12,853,349,180.28/128,860.98
  6. Step 6: Final answer
    x = 99,745.86

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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.