Home / 138,317.92-190,876.85-77,889.29

Finding the Fourth Proportional to 138,317.92, 190,876.85 and 77,889.29

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Solution

The fourth proportional to 138,317.92, 190,876.85 and 77,889.29 is: 107,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,317.92 : 190,876.85 = 77,889.29 : x
  2. Step 2: Convert to fraction form
    138,317.92/190,876.85 = 77,889.29/x
  3. Step 3: Cross multiply
    138,317.92x = 190,876.85 × 77,889.29
  4. Step 4: Simplify right side
    138,317.92x = 14,867,261,564.28
  5. Step 5: Solve for x
    x = 14,867,261,564.28/138,317.92
  6. Step 6: Final answer
    x = 107,486.16

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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.