Home / 138,948.51-191,746.44-78,517.86

Finding the Fourth Proportional to 138,948.51, 191,746.44 and 78,517.86

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Solution

The fourth proportional to 138,948.51, 191,746.44 and 78,517.86 is: 108,353.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,948.51 : 191,746.44 = 78,517.86 : x
  2. Step 2: Convert to fraction form
    138,948.51/191,746.44 = 78,517.86/x
  3. Step 3: Cross multiply
    138,948.51x = 191,746.44 × 78,517.86
  4. Step 4: Simplify right side
    138,948.51x = 15,055,520,131.42
  5. Step 5: Solve for x
    x = 15,055,520,131.42/138,948.51
  6. Step 6: Final answer
    x = 108,353.23

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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.