Home / 138,467.10-191,085.81-78,026.18

Finding the Fourth Proportional to 138,467.10, 191,085.81 and 78,026.18

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Solution

The fourth proportional to 138,467.10, 191,085.81 and 78,026.18 is: 107,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,467.10 : 191,085.81 = 78,026.18 : x
  2. Step 2: Convert to fraction form
    138,467.10/191,085.81 = 78,026.18/x
  3. Step 3: Cross multiply
    138,467.10x = 191,085.81 × 78,026.18
  4. Step 4: Simplify right side
    138,467.10x = 14,909,694,851.08
  5. Step 5: Solve for x
    x = 14,909,694,851.08/138,467.10
  6. Step 6: Final answer
    x = 107,676.80

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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.