Home / 138,334.48-190,919.85-77,917.06

Finding the Fourth Proportional to 138,334.48, 190,919.85 and 77,917.06

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Solution

The fourth proportional to 138,334.48, 190,919.85 and 77,917.06 is: 107,535.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,334.48 : 190,919.85 = 77,917.06 : x
  2. Step 2: Convert to fraction form
    138,334.48/190,919.85 = 77,917.06/x
  3. Step 3: Cross multiply
    138,334.48x = 190,919.85 × 77,917.06
  4. Step 4: Simplify right side
    138,334.48x = 14,875,913,407.64
  5. Step 5: Solve for x
    x = 14,875,913,407.64/138,334.48
  6. Step 6: Final answer
    x = 107,535.83

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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.