Home / 138,091.33-190,564.22-77,661.95

Finding the Fourth Proportional to 138,091.33, 190,564.22 and 77,661.95

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Solution

The fourth proportional to 138,091.33, 190,564.22 and 77,661.95 is: 107,172.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,091.33 : 190,564.22 = 77,661.95 : x
  2. Step 2: Convert to fraction form
    138,091.33/190,564.22 = 77,661.95/x
  3. Step 3: Cross multiply
    138,091.33x = 190,564.22 × 77,661.95
  4. Step 4: Simplify right side
    138,091.33x = 14,799,588,925.43
  5. Step 5: Solve for x
    x = 14,799,588,925.43/138,091.33
  6. Step 6: Final answer
    x = 107,172.47

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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.