Home / 138,506.37-191,127.29-78,091.87

Finding the Fourth Proportional to 138,506.37, 191,127.29 and 78,091.87

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Solution

The fourth proportional to 138,506.37, 191,127.29 and 78,091.87 is: 107,760.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,506.37 : 191,127.29 = 78,091.87 : x
  2. Step 2: Convert to fraction form
    138,506.37/191,127.29 = 78,091.87/x
  3. Step 3: Cross multiply
    138,506.37x = 191,127.29 × 78,091.87
  4. Step 4: Simplify right side
    138,506.37x = 14,925,486,528.50
  5. Step 5: Solve for x
    x = 14,925,486,528.50/138,506.37
  6. Step 6: Final answer
    x = 107,760.29

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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.