Home / 138,103.76-190,567.64-77,673.12

Finding the Fourth Proportional to 138,103.76, 190,567.64 and 77,673.12

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Solution

The fourth proportional to 138,103.76, 190,567.64 and 77,673.12 is: 107,180.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,103.76 : 190,567.64 = 77,673.12 : x
  2. Step 2: Convert to fraction form
    138,103.76/190,567.64 = 77,673.12/x
  3. Step 3: Cross multiply
    138,103.76x = 190,567.64 × 77,673.12
  4. Step 4: Simplify right side
    138,103.76x = 14,801,983,169.84
  5. Step 5: Solve for x
    x = 14,801,983,169.84/138,103.76
  6. Step 6: Final answer
    x = 107,180.16

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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.